https://iesoqa-public.sharepoint.com/Pages/News/Archive_Advisory_Notices_Summary.aspx IESO Archive System Advisory Messages Sat, 24 Oct 2026 07:00 EST http://www.ieso.ca/SiteAssets/ieso-logo.gif http://www.ieso.ca en-us Copyright 2016 http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12509731 Technical Issue Impacting Private Reports Fri, 23 Oct 2026 12:22 EST 12509731 261218 2 Technical Issue Impacting Private Reports Due to an unforeseen technical issue, Market Participants may experience issues viewing their private/confidential reports. The IESO is aware, and staff are currently troubleshooting the issue. Please contact the IESO Control Room if you need to verify any schedules for the upcoming hour(s). Fri, 23 Oct 2026 11:58 EST Fri, 23 Oct 2026 12:22 EST Fri, 23 Oct 2026 11:59 EST Fri, 23 Oct 2026 12:22 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12509688 Technical Issue Impacting Private Reports Fri, 23 Oct 2026 11:59 EST 12509688 261218 1 Technical Issue Impacting Private Reports Due to an unforeseen technical issue, Market Participants may experience issues viewing their private/confidential reports. The IESO is aware, and staff are currently troubleshooting the issue. Please contact the IESO Control Room if you need to verify any schedules for the upcoming hour(s). Fri, 23 Oct 2026 11:58 EST Fri, 23 Oct 2026 14:00 EST Fri, 23 Oct 2026 11:59 EST Fri, 23 Oct 2026 11:59 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12497446 Online IESO Thu, 22 Oct 2026 22:06 EST 12497446 261211 1 Online IESO Due to an urgent maintenance outage, Online IESO will be unavailable. This includes the following applications: Registration Automation System – Manage organization registration and participant authorization, Facility registration and Meter Installation processes Notice of Disagreement (NOD) – Manage the process with participants related to settlement and invoicing concerns Meter Trouble Report (MTR) - Manage the process related to correcting revenue meter errors Meter Data Management (MDM) – Manage meter data report profiles and submit ad-hoc meter data requests Prudential System - Submit Prudential Support Information Capacity Auction – Submit Capacity Qualification and Demand Response Auction Offer Reliability Compliance Tool - Manage the process of collecting submittals from participants related to NERC reliability standards Enable Capacity Export – Give the market participant the ability to sell excess capacity to neighboring jurisdictions Online Settlement Forms - Collect market participant data required to settle the market Audit Revenue Metering Installation – Add, delete, or modify existing findings, actions, and finding classifications DR Metering Audit – Submit Demand Response metering audit Manage Contributor – Manage Demand Response Contributor Registry information Non-Compliance Report – Self-report possible breaches of the market rules CDM Plan and Measures - Used by LDCs and IESO to collaborate on changes to the LDC CDM Plans Retrofit - Manage Conservation Retrofit program and Restful API to interact with Retrofit program Industrial Energy Efficiency Program (IEEP) - Support customers across Ontario in improving their industrial processes and implementing system optimization projects Beacon – Manage the process with external suppliers related to FIT and microFIT contract management Transmission Rights Auction (TRA) – Manage auctions and allow market participants to submit bids in the TR market Market Power Mitigation (MPM) – Manage registered reference levels and reference quantities, and submit temporary reference level change requests Also, IESO will not be able to send advisory notices during the outage window. Fri, 23 Oct 2026 03:00 EST Fri, 23 Oct 2026 05:00 EST Thu, 22 Oct 2026 22:06 EST Thu, 22 Oct 2026 22:06 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12497401 IESO Reports Site Thu, 22 Oct 2026 14:24 EST 12497401 261210 1 IESO Reports Site Confidential and Public Reports will not be accessible. Fri, 23 Oct 2026 16:35 EST Fri, 23 Oct 2026 16:38 EST Thu, 22 Oct 2026 14:24 EST Thu, 22 Oct 2026 14:24 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12497400 IESO Reports Site Thu, 22 Oct 2026 14:23 EST 12497400 261209 1 IESO Reports Site Confidential and Public Reports will not be accessible. Fri, 23 Oct 2026 15:05 EST Fri, 23 Oct 2026 15:45 EST Thu, 22 Oct 2026 14:23 EST Thu, 22 Oct 2026 14:23 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12472765 Market Tool Outage Wed, 21 Oct 2026 00:30 EST 12472765 261135 1 Market Tool Outage IESO is currently experiencing an issue with EMI whereby users may receive invalid access notifications. IT are currently working to resolve. Wed, 21 Oct 2026 00:29 EST Wed, 21 Oct 2026 10:00 EST Wed, 21 Oct 2026 00:30 EST Wed, 21 Oct 2026 00:30 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12472766 Market Tool Outage Wed, 21 Oct 2026 00:51 EST 12472766 261135 2 Market Tool Outage IESO is currently experiencing an issue with EMI whereby users may receive invalid access notifications. IT are currently working to resolve. Wed, 21 Oct 2026 00:29 EST Wed, 21 Oct 2026 00:50 EST Wed, 21 Oct 2026 00:30 EST Wed, 21 Oct 2026 00:51 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12423698 Online IESO Sat, 17 Oct 2026 17:41 EST 12423698 260926 1 Online IESO Due to a planned outage, Online IESO will be unavailable. This includes the following applications: Registration Automation System – Manage organization registration and participant authorization, Facility registration and Meter Installation processes Notice of Disagreement (NOD) – Manage the process with participants related to settlement and invoicing concerns Meter Trouble Report (MTR) - Manage the process related to correcting revenue meter errors Meter Data Management (MDM) – Manage meter data report profiles and submit ad-hoc meter data requests Prudential System - Submit Prudential Support Information Capacity Auction – Submit Capacity Qualification and Demand Response Auction Offer Reliability Compliance Tool - Manage the process of collecting submittals from participants related to NERC reliability standards Enable Capacity Export – Give the market participant the ability to sell excess capacity to neighboring jurisdictions Online Settlement Forms - Collect market participant data required to settle the market Audit Revenue Metering Installation – Add, delete, or modify existing findings, actions, and finding classifications DR Metering Audit – Submit Demand Response metering audit Manage Contributor – Manage Demand Response Contributor Registry information Non-Compliance Report – Self-report possible breaches of the market rules CDM Plan and Measures - Used by LDCs and IESO to collaborate on changes to the LDC CDM Plans Retrofit - Manage Conservation Retrofit program and Restful API to interact with Retrofit program Industrial Energy Efficiency Program (IEEP) - Support customers across Ontario in improving their industrial processes and implementing system optimization projects Beacon – Manage the process with external suppliers related to FIT and microFIT contract management Transmission Rights Auction (TRA) – Manage auctions and allow market participants to submit bids in the TR market Market Power Mitigation (MPM) – Manage registered reference levels and reference quantities, and submit temporary reference level change requests Sun, 18 Oct 2026 01:00 EST Sun, 18 Oct 2026 03:00 EST Sat, 17 Oct 2026 17:41 EST Sat, 17 Oct 2026 17:41 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12399341 5-minute Wind Forecast Disabled Thu, 15 Oct 2026 17:49 EST 12399341 260901 1 5-minute Wind Forecast Disabled Wind output is approximately 400 MW over forecast. The 5-minute variable generation forecast has been disabled as of 17:47. Thu, 15 Oct 2026 17:47 EST Thu, 15 Oct 2026 23:59 EST Thu, 15 Oct 2026 17:49 EST Thu, 15 Oct 2026 17:49 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12399028 K6F at Sioux Narrows Thu, 15 Oct 2026 10:02 EST 12399028 260896 1 K6F at Sioux Narrows At beginning of the outage, break parallel with K6F-10 which is located at Sioux Narrows JCT, gen biasing required, safe break is 11.0 MVA The sum of Whitedog and Caribou generation needs to be restricted below 40MW for switching only. No restrictions on close. Sun, 18 Oct 2026 08:00 EST Sun, 18 Oct 2026 08:30 EST Thu, 15 Oct 2026 10:02 EST Thu, 15 Oct 2026 10:02 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12398984 Dispatch Service Thu, 15 Oct 2026 09:21 EST 12398984 260895 1 Dispatch Service Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage. Users may get disconnected and will need to login and verify access (MP action may be required). Fri, 16 Oct 2026 10:25 EST Fri, 16 Oct 2026 10:40 EST Thu, 15 Oct 2026 09:21 EST Thu, 15 Oct 2026 09:21 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12398788 DR Erroneous Standby Notice Thu, 15 Oct 2026 03:55 EST 12398788 260885 1 DR Erroneous Standby Notice Due to an input error, the Toronto HDR Resources were incorrectly scheduled and issued Standby notices for Trade Date 10/15/2026. Market Participants are directed to disregard the Standby notices and manage bids accordingly. Thu, 15 Oct 2026 03:00 EST Thu, 15 Oct 2026 04:00 EST Thu, 15 Oct 2026 03:55 EST Thu, 15 Oct 2026 03:55 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12362526 Generation Biasing Tue, 13 Oct 2026 13:47 EST 12362526 260783 1 Generation Biasing Generation biasing may be required to facilitate planned switching on circuit B5QK. Sun, 18 Oct 2026 00:00 EST Sun, 18 Oct 2026 00:15 EST Tue, 13 Oct 2026 13:47 EST Tue, 13 Oct 2026 13:47 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12326393 Geomagnetic Disturbance Sat, 10 Oct 2026 11:23 EST 12326393 260715 1 Geomagnetic Disturbance A geomagnetic storm warning of Kp7 has been issued. Market Participants are reminded to notify the IESO of abnormal behavior such as voltage fluctuations, reactive power swings, or negative sequence alarms. Sat, 10 Oct 2026 11:11 EST Sat, 10 Oct 2026 22:11 EST Sat, 10 Oct 2026 11:23 EST Sat, 10 Oct 2026 11:23 EST Warning http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12326394 Geomagnetic Disturbance Sat, 10 Oct 2026 15:05 EST 12326394 260715 2 Geomagnetic Disturbance A geomagnetic storm warning of Kp7 has been issued. Market Participants are reminded to notify the IESO of abnormal behavior such as voltage fluctuations, reactive power swings, or negative sequence alarms. Sat, 10 Oct 2026 11:11 EST Sat, 10 Oct 2026 23:59 EST Sat, 10 Oct 2026 11:23 EST Sat, 10 Oct 2026 15:05 EST Warning http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12326395 Geomagnetic Disturbance Sat, 10 Oct 2026 21:30 EST 12326395 260715 3 Geomagnetic Disturbance A geomagnetic storm warning of Kp7 has been issued. Market Participants are reminded to notify the IESO of abnormal behavior such as voltage fluctuations, reactive power swings, or negative sequence alarms. Sat, 10 Oct 2026 11:11 EST Sat, 10 Oct 2026 21:30 EST Sat, 10 Oct 2026 11:23 EST Sat, 10 Oct 2026 21:30 EST Warning http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12301794 5-minute Wind Forecast Disabled Thu, 08 Oct 2026 17:06 EST 12301794 260663 1 5-minute Wind Forecast Disabled Wind output is under forecast by 500 MW. The 5-minute variable generation forecast has been disabled as of 16:55 EST Thu, 08 Oct 2026 17:06 EST Thu, 08 Oct 2026 23:59 EST Thu, 08 Oct 2026 17:06 EST Thu, 08 Oct 2026 17:06 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12301795 5-minute Wind Forecast Disabled Thu, 08 Oct 2026 18:46 EST 12301795 260663 2 5-minute Wind Forecast Disabled Wind output is under forecast by 500 MW. The 5-minute variable generation forecast has been disabled as of 16:55 EST Thu, 08 Oct 2026 17:06 EST Thu, 08 Oct 2026 18:46 EST Thu, 08 Oct 2026 17:06 EST Thu, 08 Oct 2026 18:46 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12300721 Dispatch Service Thu, 08 Oct 2026 05:31 EST 12300721 260618 1 Dispatch Service Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage. Users may get disconnected and will need to login and verify access (MP action may be required). Fri, 09 Oct 2026 14:25 EST Fri, 09 Oct 2026 14:45 EST Thu, 08 Oct 2026 05:31 EST Thu, 08 Oct 2026 05:31 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12276611 HDR Activations Invalid Wed, 07 Oct 2026 15:25 EST 12276611 260616 2 HDR Activations Invalid Hourly Demand Response (HDR) activations issued for HE13 through HE20 are invalid. IESO is working to correct this issue and will advise when it is resolved. Wed, 07 Oct 2026 14:21 EST Wed, 07 Oct 2026 20:00 EST Wed, 07 Oct 2026 14:22 EST Wed, 07 Oct 2026 15:25 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12276323 HDR Activations Invalid Wed, 07 Oct 2026 14:22 EST 12276323 260616 1 HDR Activations Invalid Hourly Demand Response (HDR) activations issued for HE13 through HE20 are invalid. IESO is working to correct this issue and will advise when it is resolved. Wed, 07 Oct 2026 14:21 EST Wed, 07 Oct 2026 16:00 EST Wed, 07 Oct 2026 14:22 EST Wed, 07 Oct 2026 14:22 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12276616 HDR Activations Invalid Wed, 07 Oct 2026 15:26 EST 12276616 260616 3 HDR Activations Invalid Hourly Demand Response (HDR) activations issued for HE13 through HE20 are invalid, do not follow any activation instructions. Wed, 07 Oct 2026 14:21 EST Wed, 07 Oct 2026 20:00 EST Wed, 07 Oct 2026 14:22 EST Wed, 07 Oct 2026 15:26 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12276649 Predispatch Report Failed Wed, 07 Oct 2026 15:48 EST 12276649 260615 2 Predispatch Report Failed The 14:04 run of Predispatch is invalid, please refer to the 12:04 run of redispatch results. Wed, 07 Oct 2026 14:16 EST Wed, 07 Oct 2026 15:48 EST Wed, 07 Oct 2026 14:21 EST Wed, 07 Oct 2026 15:48 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12276322 Predispatch Report Failed Wed, 07 Oct 2026 14:21 EST 12276322 260615 1 Predispatch Report Failed The 14:04 run of Predispatch is invalid, please refer to the 12:04 run of redispatch results. Wed, 07 Oct 2026 14:16 EST Wed, 07 Oct 2026 16:00 EST Wed, 07 Oct 2026 14:21 EST Wed, 07 Oct 2026 14:21 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12276145 5-minute Wind Forecast Disabled Wed, 07 Oct 2026 11:11 EST 12276145 260606 1 5-minute Wind Forecast Disabled Wind output is under forecast by 500 MW. The 5-minute variable generation forecast has been disabled as of 11:10. Wed, 07 Oct 2026 11:10 EST Wed, 07 Oct 2026 14:00 EST Wed, 07 Oct 2026 11:11 EST Wed, 07 Oct 2026 11:11 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12275436 EMI Wed, 07 Oct 2026 05:35 EST 12275436 260602 1 EMI Energy Market Interface (EMI) will be unavailable. EMI is the Web UI component of the Market Information Management (MIM) solution used to submit dispatch data. Users may get disconnected and will need to login and verify access eMIM API will be unavailable. eMIM is the MIM Application Programming Interface used to submit dispatch data. Users may get disconnected and will need to login and verify access. Thu, 08 Oct 2026 14:25 EST Thu, 08 Oct 2026 14:45 EST Wed, 07 Oct 2026 05:35 EST Wed, 07 Oct 2026 05:35 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12275435 Dispatch Service Wed, 07 Oct 2026 05:34 EST 12275435 260601 1 Dispatch Service Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage. Users may get disconnected and will need to login and verify access (MP action may be required). Thu, 08 Oct 2026 14:25 EST Thu, 08 Oct 2026 14:45 EST Wed, 07 Oct 2026 05:34 EST Wed, 07 Oct 2026 05:34 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12275434 IESO Reports Site Wed, 07 Oct 2026 05:33 EST 12275434 260600 1 IESO Reports Site Confidential Report publication will be delayed. Public Report publication will be delayed. Thu, 08 Oct 2026 14:25 EST Thu, 08 Oct 2026 14:45 EST Wed, 07 Oct 2026 05:33 EST Wed, 07 Oct 2026 05:33 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12275433 Online IESO Wed, 07 Oct 2026 05:33 EST 12275433 260599 1 Online IESO Due to planned outage Online IESO will not be available. This includes the following applications: Registration Automation System – Manage organization registration and participant authorization, Facility registration and Meter Installation processes Notice of Disagreement (NOD) – Manage the process with participants related to settlement and invoicing concerns Meter Trouble Report (MTR) - Manage the process related to correcting revenue meter errors Meter Data Management (MDM) – Manage meter data report profiles and submit ad-hoc meter data requests Prudential System - Submit Prudential Support Information Capacity Auction – Submit Capacity Qualification and Demand Response Auction Offer Reliability Compliance Tool - Manage the process of collecting submittals from participants related to NERC reliability standards Enable Capacity Export – Give the market participant the ability to sell excess capacity to neighboring jurisdictions Online Settlement Forms - Collect market participant data required to settle the market Audit Revenue Metering Installation – Add, delete, or modify existing findings, actions, and finding classifications DR Metering Audit – Submit Demand Response metering audit Manage Contributor – Manage Demand Response Contributor Registry information Non-Compliance Report – Self-report possible breaches of the market rules CDM Plan and Measures - Used by LDCs and IESO to collaborate on changes to the LDC CDM Plans Retrofit - Manage Conservation Retrofit program and Restful API to interact with Retrofit program Industrial Energy Efficiency Program (IEEP) - Support customers across Ontario in improving their industrial processes and implementing system optimization projects Beacon – Manage the process with external suppliers related to FIT and microFIT contract management Transmission Rights Auction (TRA) – Manage auctions and allow market participants to submit bids in the TR market Market Power Mitigation (MPM) – Manage registered reference levels and reference quantities, and submit temporary reference level change requests Thu, 08 Oct 2026 14:25 EST Thu, 08 Oct 2026 14:45 EST Wed, 07 Oct 2026 05:33 EST Wed, 07 Oct 2026 05:33 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12263568 Automated Dispatch Resuming Wed, 07 Oct 2026 00:26 EST 12263568 260595 1 Automated Dispatch Resuming IESO performed another reboot to dispatch service. This may require market participants to reboot their dispatch service again to regain connection. Wed, 07 Oct 2026 00:17 EST Wed, 07 Oct 2026 02:00 EST Wed, 07 Oct 2026 00:26 EST Wed, 07 Oct 2026 00:26 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12263567 Automated Dispatch Resuming Tue, 06 Oct 2026 23:07 EST 12263567 260594 1 Automated Dispatch Resuming Dispatch Service experiencing intermittent connection issues, IESO to perform a reboot to dispatch service. This may require market participants to reboot their dispatch service again to regain connection. Tue, 06 Oct 2026 23:07 EST Tue, 06 Oct 2026 23:59 EST Tue, 06 Oct 2026 23:07 EST Tue, 06 Oct 2026 23:07 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12263565 Automated Dispatch Resuming Tue, 06 Oct 2026 22:14 EST 12263565 260593 1 Automated Dispatch Resuming Momentary lose of connection caused dispatch service to go down. Connection issue has been resolved and market participants may need to reboot their dispatch service. Tue, 06 Oct 2026 22:10 EST Tue, 06 Oct 2026 23:59 EST Tue, 06 Oct 2026 22:14 EST Tue, 06 Oct 2026 22:14 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12263566 Automated Dispatch Resuming Tue, 06 Oct 2026 22:57 EST 12263566 260593 2 Automated Dispatch Resuming Momentary lose of connection caused dispatch service to go down. Connection issue has been resolved and market participants may need to reboot their dispatch service. Tue, 06 Oct 2026 22:10 EST Tue, 06 Oct 2026 22:56 EST Tue, 06 Oct 2026 22:14 EST Tue, 06 Oct 2026 22:57 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12261847 Market Tool Outage - OMB Tue, 06 Oct 2026 08:30 EST 12261847 260527 1 Market Tool Outage - OMB 13:15 - 13:45 EDT Dispatch Service: Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage. Users may get disconnected and will need to login and verify access (MP action may be required). 13:15 - 13:45 EDT ICCP: The Inter-Control Center Communication Protocol (ICCP) link to IESO will be unavailable. 13:15 - 13:45 EDT IESO Reports Site: Confidential Report publication will be delayed. Public Report publication will be delayed. 13:15 - 13:45 EDT UCM: Commitment notifications will not be issued. 14:00 - 14:10 EDT IESO Reports Site: The Adequacy report will not be published. 14:00 - 15:00 EDT IESO Reports Site: The Predispatch report will not be published. Wed, 07 Oct 2026 13:15 EST Wed, 07 Oct 2026 15:00 EST Tue, 06 Oct 2026 08:30 EST Tue, 06 Oct 2026 08:30 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12249322 Dispatch Service Mon, 05 Oct 2026 14:18 EST 12249322 260510 1 Dispatch Service Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage. Users may get disconnected and will need to login and verify access (MP action may be required). Tue, 06 Oct 2026 13:20 EST Tue, 06 Oct 2026 13:50 EST Mon, 05 Oct 2026 14:18 EST Mon, 05 Oct 2026 14:18 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12261762 Dispatch Service Tue, 06 Oct 2026 02:55 EST 12261762 260510 2 Dispatch Service Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage. Users may get disconnected and will need to login and verify access (MP action may be required). Tue, 06 Oct 2026 12:20 EST Tue, 06 Oct 2026 12:50 EST Mon, 05 Oct 2026 14:18 EST Tue, 06 Oct 2026 02:55 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12246453 5-minute Wind Forecast Disabled Mon, 05 Oct 2026 05:06 EST 12246453 260412 1 5-minute Wind Forecast Disabled Wind output is under forecast by 500 MW. The 5-minute variable generation forecast has been disabled as of 05:05. Mon, 05 Oct 2026 05:05 EST Mon, 05 Oct 2026 10:00 EST Mon, 05 Oct 2026 05:06 EST Mon, 05 Oct 2026 05:06 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12246482 5-minute Wind Forecast Disabled Mon, 05 Oct 2026 06:57 EST 12246482 260412 2 5-minute Wind Forecast Disabled Wind output is under forecast by 500 MW. The 5-minute variable generation forecast has been disabled as of 05:05. Mon, 05 Oct 2026 05:05 EST Mon, 05 Oct 2026 06:57 EST Mon, 05 Oct 2026 05:06 EST Mon, 05 Oct 2026 06:57 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12222671 Generation Biasing Sat, 03 Oct 2026 14:12 EST 12222671 260409 1 Generation Biasing Generation biasing may be required to facilitate planned switching on circuit K6F. Sun, 04 Oct 2026 08:00 EST Sun, 04 Oct 2026 09:00 EST Sat, 03 Oct 2026 14:12 EST Sat, 03 Oct 2026 14:12 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12209898 5-minute Wind Forecast Disabled Fri, 02 Oct 2026 06:29 EST 12209898 260365 1 5-minute Wind Forecast Disabled Wind output is under forecast by 300 MW. The 5-minute variable generation forecast has been disabled as of 06:28. Fri, 02 Oct 2026 06:28 EST Fri, 02 Oct 2026 10:00 EST Fri, 02 Oct 2026 06:29 EST Fri, 02 Oct 2026 06:29 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12209975 5-minute Wind Forecast Disabled Fri, 02 Oct 2026 08:39 EST 12209975 260365 2 5-minute Wind Forecast Disabled Wind output is under forecast by 300 MW. The 5-minute variable generation forecast has been disabled as of 06:28. Fri, 02 Oct 2026 06:28 EST Fri, 02 Oct 2026 12:00 EST Fri, 02 Oct 2026 06:29 EST Fri, 02 Oct 2026 08:39 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12210365 5-minute Wind Forecast Disabled Fri, 02 Oct 2026 11:06 EST 12210365 260365 4 5-minute Wind Forecast Disabled Wind output is under forecast by 300 MW. The 5-minute variable generation forecast has been disabled as of 06:28. Fri, 02 Oct 2026 06:28 EST Fri, 02 Oct 2026 11:05 EST Fri, 02 Oct 2026 06:29 EST Fri, 02 Oct 2026 11:06 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12210343 5-minute Wind Forecast Disabled Fri, 02 Oct 2026 10:36 EST 12210343 260365 3 5-minute Wind Forecast Disabled Wind output is under forecast by 300 MW. The 5-minute variable generation forecast has been disabled as of 06:28. Fri, 02 Oct 2026 06:28 EST Fri, 02 Oct 2026 14:00 EST Fri, 02 Oct 2026 06:29 EST Fri, 02 Oct 2026 10:36 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12159949 Generation Biasing Mon, 28 Sep 2026 17:12 EST 12159949 260080 1 Generation Biasing Generation Biasing may be required to facilitate planned switching on L5A. Mon, 05 Oct 2026 07:00 EST Mon, 05 Oct 2026 07:30 EST Mon, 28 Sep 2026 17:12 EST Mon, 28 Sep 2026 17:12 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12159331 EMI Mon, 28 Sep 2026 09:04 EST 12159331 260044 1 EMI Energy Market Interface (EMI) will be unavailable. EMI is the Web UI component of the Market Information Management (MIM) solution used to submit dispatch data. Users may get disconnected and will need to login and verify access eMIM API will be unavailable. eMIM is the MIM Application Programming Interface used to submit dispatch data. Users may get disconnected and will need to login and verify access. Tue, 29 Sep 2026 14:25 EST Tue, 29 Sep 2026 14:45 EST Mon, 28 Sep 2026 09:04 EST Mon, 28 Sep 2026 09:04 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12159621 EMI Mon, 28 Sep 2026 14:06 EST 12159621 260044 2 EMI Energy Market Interface (EMI) will be unavailable. EMI is the Web UI component of the Market Information Management (MIM) solution used to submit dispatch data. Users may get disconnected and will need to login and verify access eMIM API will be unavailable. eMIM is the MIM Application Programming Interface used to submit dispatch data. Users may get disconnected and will need to login and verify access. Tue, 29 Sep 2026 14:25 EST Mon, 28 Sep 2026 14:06 EST Mon, 28 Sep 2026 09:04 EST Mon, 28 Sep 2026 14:06 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12159622 Dispatch Service Mon, 28 Sep 2026 14:07 EST 12159622 260043 2 Dispatch Service Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage. Users may get disconnected and will need to login and verify access (MP action may be required). Tue, 29 Sep 2026 14:25 EST Mon, 28 Sep 2026 14:07 EST Mon, 28 Sep 2026 09:03 EST Mon, 28 Sep 2026 14:07 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12159330 Dispatch Service Mon, 28 Sep 2026 09:03 EST 12159330 260043 1 Dispatch Service Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage. Users may get disconnected and will need to login and verify access (MP action may be required). Tue, 29 Sep 2026 14:25 EST Tue, 29 Sep 2026 14:45 EST Mon, 28 Sep 2026 09:03 EST Mon, 28 Sep 2026 09:03 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12159329 Online IESO Mon, 28 Sep 2026 09:02 EST 12159329 260042 1 Online IESO Due to planned outage Online IESO will not be available. This includes the following applications: Registration Automation System – Manage organization registration and participant authorization, Facility registration and Meter Installation processes Notice of Disagreement (NOD) – Manage the process with participants related to settlement and invoicing concerns Meter Trouble Report (MTR) - Manage the process related to correcting revenue meter errors Meter Data Management (MDM) – Manage meter data report profiles and submit ad-hoc meter data requests Prudential System - Submit Prudential Support Information Capacity Auction – Submit Capacity Qualification and Demand Response Auction Offer Reliability Compliance Tool - Manage the process of collecting submittals from participants related to NERC reliability standards Enable Capacity Export – Give the market participant the ability to sell excess capacity to neighboring jurisdictions Online Settlement Forms - Collect market participant data required to settle the market Audit Revenue Metering Installation – Add, delete, or modify existing findings, actions, and finding classifications DR Metering Audit – Submit Demand Response metering audit Manage Contributor – Manage Demand Response Contributor Registry information Non-Compliance Report – Self-report possible breaches of the market rules CDM Plan and Measures - Used by LDCs and IESO to collaborate on changes to the LDC CDM Plans Retrofit - Manage Conservation Retrofit program and Restful API to interact with Retrofit program Industrial Energy Efficiency Program (IEEP) - Support customers across Ontario in improving their industrial processes and implementing system optimization projects Beacon – Manage the process with external suppliers related to FIT and microFIT contract management Transmission Rights Auction (TRA) – Manage auctions and allow market participants to submit bids in the TR market Market Power Mitigation (MPM) – Manage registered reference levels and reference quantities, and submit temporary reference level change requests Tue, 29 Sep 2026 14:25 EST Tue, 29 Sep 2026 14:45 EST Mon, 28 Sep 2026 09:02 EST Mon, 28 Sep 2026 09:02 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12159623 Online IESO Mon, 28 Sep 2026 14:07 EST 12159623 260042 2 Online IESO Due to planned outage Online IESO will not be available. This includes the following applications: Registration Automation System – Manage organization registration and participant authorization, Facility registration and Meter Installation processes Notice of Disagreement (NOD) – Manage the process with participants related to settlement and invoicing concerns Meter Trouble Report (MTR) - Manage the process related to correcting revenue meter errors Meter Data Management (MDM) – Manage meter data report profiles and submit ad-hoc meter data requests Prudential System - Submit Prudential Support Information Capacity Auction – Submit Capacity Qualification and Demand Response Auction Offer Reliability Compliance Tool - Manage the process of collecting submittals from participants related to NERC reliability standards Enable Capacity Export – Give the market participant the ability to sell excess capacity to neighboring jurisdictions Online Settlement Forms - Collect market participant data required to settle the market Audit Revenue Metering Installation – Add, delete, or modify existing findings, actions, and finding classifications DR Metering Audit – Submit Demand Response metering audit Manage Contributor – Manage Demand Response Contributor Registry information Non-Compliance Report – Self-report possible breaches of the market rules CDM Plan and Measures - Used by LDCs and IESO to collaborate on changes to the LDC CDM Plans Retrofit - Manage Conservation Retrofit program and Restful API to interact with Retrofit program Industrial Energy Efficiency Program (IEEP) - Support customers across Ontario in improving their industrial processes and implementing system optimization projects Beacon – Manage the process with external suppliers related to FIT and microFIT contract management Transmission Rights Auction (TRA) – Manage auctions and allow market participants to submit bids in the TR market Market Power Mitigation (MPM) – Manage registered reference levels and reference quantities, and submit temporary reference level change requests Tue, 29 Sep 2026 14:25 EST Mon, 28 Sep 2026 14:07 EST Mon, 28 Sep 2026 09:02 EST Mon, 28 Sep 2026 14:07 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12159624 IESO Reports Site Mon, 28 Sep 2026 14:07 EST 12159624 260040 2 IESO Reports Site Confidential Report publication will be delayed. Public Report publication will be delayed. Tue, 29 Sep 2026 14:25 EST Mon, 28 Sep 2026 14:07 EST Mon, 28 Sep 2026 09:01 EST Mon, 28 Sep 2026 14:07 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12159328 IESO Reports Site Mon, 28 Sep 2026 09:01 EST 12159328 260040 1 IESO Reports Site Confidential Report publication will be delayed. Public Report publication will be delayed. Tue, 29 Sep 2026 14:25 EST Tue, 29 Sep 2026 14:45 EST Mon, 28 Sep 2026 09:01 EST Mon, 28 Sep 2026 09:01 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12109805 5-minute Wind Forecast Disabled Thu, 24 Sep 2026 19:20 EST 12109805 260000 1 5-minute Wind Forecast Disabled Wind output is over forecast. The 5-minute variable generation forecast has been disabled as of 19:18. Thu, 24 Sep 2026 19:18 EST Fri, 25 Sep 2026 05:00 EST Thu, 24 Sep 2026 19:20 EST Thu, 24 Sep 2026 19:20 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12109806 5-minute Wind Forecast Disabled Thu, 24 Sep 2026 19:22 EST 12109806 260000 2 5-minute Wind Forecast Disabled Wind output is over forecast. The 5-minute variable generation forecast has been disabled as of 19:18. Thu, 24 Sep 2026 19:18 EST Thu, 24 Sep 2026 19:22 EST Thu, 24 Sep 2026 19:20 EST Thu, 24 Sep 2026 19:22 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12109360 Generation Biasing Thu, 24 Sep 2026 08:25 EST 12109360 259755 1 Generation Biasing Generation Biasing may be required to facilitate planned switching on K6F. Sun, 27 Sep 2026 08:00 EST Sun, 27 Sep 2026 08:30 EST Thu, 24 Sep 2026 08:25 EST Thu, 24 Sep 2026 08:25 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12097336 Market Tool Outage Wed, 23 Sep 2026 14:01 EST 12097336 259749 2 Market Tool Outage Automated participant reports are currently slow to publish. Please contact the IESO if you require resource specific real time information. Wed, 23 Sep 2026 12:44 EST Wed, 23 Sep 2026 14:01 EST Wed, 23 Sep 2026 12:48 EST Wed, 23 Sep 2026 14:01 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12097263 Market Tool Outage Wed, 23 Sep 2026 12:48 EST 12097263 259749 1 Market Tool Outage Automated participant reports are currently slow to publish. Please contact the IESO if you require resource specific real time information. Wed, 23 Sep 2026 12:44 EST Wed, 23 Sep 2026 23:59 EST Wed, 23 Sep 2026 12:48 EST Wed, 23 Sep 2026 12:48 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12059049 Unplanned Outage to Dispatch Services Sun, 20 Sep 2026 19:56 EST 12059049 259664 2 Unplanned Outage to Dispatch Services Automatic/electronic dispatching is experiencing an unplanned outage. We are investigating this market tool outage and restarting the service for all participants may be required. The IESO will issue dispatch instructions over the phone as required. Sun, 20 Sep 2026 18:17 EST Sun, 20 Sep 2026 19:56 EST Sun, 20 Sep 2026 18:19 EST Sun, 20 Sep 2026 19:56 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12059048 Unplanned Outage to Dispatch Services Sun, 20 Sep 2026 18:19 EST 12059048 259664 1 Unplanned Outage to Dispatch Services Automatic/electronic dispatching is experiencing an unplanned outage. We are investigating this market tool outage and restarting the service for all participants may be required. The IESO will issue dispatch instructions over the phone as required. Sun, 20 Sep 2026 18:17 EST Sun, 20 Sep 2026 21:00 EST Sun, 20 Sep 2026 18:19 EST Sun, 20 Sep 2026 18:19 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12010434 Pre-emptive ONT-PJM Transaction Curtailments Wed, 16 Sep 2026 20:36 EST 12010434 259606 2 Pre-emptive ONT-PJM Transaction Curtailments The IESO is pre-emptively curtailing ONT-PJM transaction(s) 90 minutes in advance due to an external TLR that has been persistently curtailing the same transaction(s). Wed, 16 Sep 2026 17:50 EST Wed, 16 Sep 2026 20:36 EST Wed, 16 Sep 2026 17:51 EST Wed, 16 Sep 2026 20:36 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12010433 Pre-emptive ONT-PJM Transaction Curtailments Wed, 16 Sep 2026 17:51 EST 12010433 259606 1 Pre-emptive ONT-PJM Transaction Curtailments The IESO is pre-emptively curtailing ONT-PJM transaction(s) 90 minutes in advance due to an external TLR that has been persistently curtailing the same transaction(s). Wed, 16 Sep 2026 17:50 EST Wed, 16 Sep 2026 23:59 EST Wed, 16 Sep 2026 17:51 EST Wed, 16 Sep 2026 17:51 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12010394 Dispatch Service Wed, 16 Sep 2026 15:13 EST 12010394 259604 1 Dispatch Service Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage. Users may get disconnected and will need to login and verify access (MP action may be required). Thu, 17 Sep 2026 10:25 EST Thu, 17 Sep 2026 10:40 EST Wed, 16 Sep 2026 15:13 EST Wed, 16 Sep 2026 15:13 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=12022438 Dispatch Service Thu, 17 Sep 2026 10:38 EST 12022438 259604 2 Dispatch Service Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage. Users may get disconnected and will need to login and verify access (MP action may be required). Thu, 17 Sep 2026 10:25 EST Thu, 17 Sep 2026 10:50 EST Wed, 16 Sep 2026 15:13 EST Thu, 17 Sep 2026 10:38 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11984068 Dispatch Service Mon, 14 Sep 2026 05:41 EST 11984068 259238 1 Dispatch Service Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage. Users may get disconnected and will need to login and verify access (MP action may be required). Tue, 15 Sep 2026 12:20 EST Tue, 15 Sep 2026 12:40 EST Mon, 14 Sep 2026 05:41 EST Mon, 14 Sep 2026 05:41 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11972196 5-minute Wind Forecast Disabled Sun, 13 Sep 2026 15:00 EST 11972196 259237 2 5-minute Wind Forecast Disabled Wind output is approximately 300 MW above forecast. The 5-minute variable generation forecast has been disabled as of 13:45. Sun, 13 Sep 2026 13:45 EST Sun, 13 Sep 2026 15:00 EST Sun, 13 Sep 2026 13:51 EST Sun, 13 Sep 2026 15:00 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11972195 5-minute Wind Forecast Disabled Sun, 13 Sep 2026 13:51 EST 11972195 259237 1 5-minute Wind Forecast Disabled Wind output is approximately 300 MW above forecast. The 5-minute variable generation forecast has been disabled as of 13:45. Sun, 13 Sep 2026 13:45 EST Sun, 13 Sep 2026 23:59 EST Sun, 13 Sep 2026 13:51 EST Sun, 13 Sep 2026 13:51 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11908034 Market Tool Outage - OMB Tue, 08 Sep 2026 05:41 EST 11908034 259116 1 Market Tool Outage - OMB 13:15 - 13:45 EDT Dispatch Service: Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage. Users may get disconnected and will need to login and verify access (MP action may be required). 13:15 - 13:45 EDT ICCP: The Inter-Control Center Communication Protocol (ICCP) link to IESO will be unavailable. 13:15 - 13:45 EDT IESO Reports Site: Confidential Report publication will be delayed. Public Report publication will be delayed. 13:15 - 13:45 EDT UCM: Commitment notifications will not be issued. 14:00 - 14:10 EDT IESO Reports Site: The Adequacy report will not be published. 14:00 - 15:00 EDT IESO Reports Site: The Predispatch report will not be published. Wed, 09 Sep 2026 13:15 EST Wed, 09 Sep 2026 15:00 EST Tue, 08 Sep 2026 05:41 EST Tue, 08 Sep 2026 05:41 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11859408 IESO Reports Site Fri, 04 Sep 2026 10:37 EST 11859408 259038 2 IESO Reports Site Due to a planned IT outage, market participant private/public reports may be unavailable for up to 5 minutes during this outage window. Fri, 04 Sep 2026 10:30 EST Fri, 04 Sep 2026 11:00 EST Fri, 04 Sep 2026 06:32 EST Fri, 04 Sep 2026 10:37 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11858845 IESO Reports Site Fri, 04 Sep 2026 06:32 EST 11858845 259038 1 IESO Reports Site Due to a planned IT outage, market participant private/public reports may be unavailable for up to 5 minutes during this outage window. Fri, 04 Sep 2026 13:00 EST Fri, 04 Sep 2026 13:30 EST Fri, 04 Sep 2026 06:32 EST Fri, 04 Sep 2026 06:32 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11846963 5-minute Wind Forecast Disabled Thu, 03 Sep 2026 16:19 EST 11846963 259037 2 5-minute Wind Forecast Disabled Wind output is approximately 500 MW over forecast. The 5-minute variable generation forecast has been disabled as of 15:50. Thu, 03 Sep 2026 15:50 EST Thu, 03 Sep 2026 16:19 EST Thu, 03 Sep 2026 15:54 EST Thu, 03 Sep 2026 16:19 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11846946 5-minute Wind Forecast Disabled Thu, 03 Sep 2026 15:54 EST 11846946 259037 1 5-minute Wind Forecast Disabled Wind output is approximately 500 MW over forecast. The 5-minute variable generation forecast has been disabled as of 15:50. Thu, 03 Sep 2026 15:50 EST Thu, 03 Sep 2026 23:00 EST Thu, 03 Sep 2026 15:54 EST Thu, 03 Sep 2026 15:54 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11846749 Generation Biasing Thu, 03 Sep 2026 11:41 EST 11846749 259026 1 Generation Biasing Generation biasing may be required to facilitate planned switching for C7BM (1-00299176) Mon, 07 Sep 2026 03:30 EST Mon, 07 Sep 2026 03:45 EST Thu, 03 Sep 2026 11:41 EST Thu, 03 Sep 2026 11:41 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11896161 Generation Biasing Mon, 07 Sep 2026 05:58 EST 11896161 258693 2 Generation Biasing Generation biasing may be required to facilitate planned switching for Chenaux A2 Bus (1-00312238) Tue, 08 Sep 2026 15:30 EST Tue, 08 Sep 2026 16:00 EST Tue, 01 Sep 2026 14:00 EST Mon, 07 Sep 2026 05:58 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11822022 Generation Biasing Tue, 01 Sep 2026 14:00 EST 11822022 258693 1 Generation Biasing Generation biasing may be required to facilitate planned switching for Chenaux A2 Bus (1-00312238) Tue, 08 Sep 2026 16:00 EST Tue, 08 Sep 2026 16:15 EST Tue, 01 Sep 2026 14:00 EST Tue, 01 Sep 2026 14:00 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11822000 Interruptible Rate Pilot Long-Notice Event Tue, 01 Sep 2026 13:50 EST 11822000 258692 1 Interruptible Rate Pilot Long-Notice Event A Long-Notice Event will be taking place as part of the Interruptible Rate Pilot. In accordance with the Interruption Obligation, Pilot Participants are to reduce the participating facility's demand to no greater than their Contract Demand. Wed, 02 Sep 2026 14:00 EST Wed, 02 Sep 2026 18:00 EST Tue, 01 Sep 2026 13:50 EST Tue, 01 Sep 2026 13:50 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11821981 Generation Biasing Tue, 01 Sep 2026 13:36 EST 11821981 258691 1 Generation Biasing Generation biasing may be required to facilitate planned switching on circuit H24S (1-00294340). Wed, 02 Sep 2026 08:00 EST Wed, 02 Sep 2026 09:00 EST Tue, 01 Sep 2026 13:36 EST Tue, 01 Sep 2026 13:36 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11821187 Day-Ahead - Save on Energy DR Scheduled Tue, 01 Sep 2026 07:37 EST 11821187 258644 1 Day-Ahead - Save on Energy DR Scheduled Demand Response Programs totaling 187 MWs have been scheduled. The Ontario Demand Forecast has been adjusted over the activation period. Wed, 02 Sep 2026 16:00 EST Wed, 02 Sep 2026 19:00 EST Tue, 01 Sep 2026 07:37 EST Tue, 01 Sep 2026 07:37 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11808961 IESO Reports Site Mon, 31 Aug 2026 23:40 EST 11808961 258625 2 IESO Reports Site Due to an uplanned IT outage, some market participant private/public reports could be delayed being published. Mon, 31 Aug 2026 22:39 EST Tue, 01 Sep 2026 01:00 EST Mon, 31 Aug 2026 22:40 EST Mon, 31 Aug 2026 23:40 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11808960 IESO Reports Site Mon, 31 Aug 2026 22:40 EST 11808960 258625 1 IESO Reports Site Due to an uplanned IT outage, some market participant private/public reports could be delayed being published this hour. Mon, 31 Aug 2026 22:39 EST Mon, 31 Aug 2026 23:59 EST Mon, 31 Aug 2026 22:40 EST Mon, 31 Aug 2026 22:40 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11808682 Interruptible Rate Pilot Long-Notice Event Mon, 31 Aug 2026 13:38 EST 11808682 258618 1 Interruptible Rate Pilot Long-Notice Event A Long-Notice Event will be taking place as part of the Interruptible Rate Pilot. In accordance with the Interruption Obligation, Pilot Participants are to reduce the participating facility's demand to no greater than their Contract Demand. Tue, 01 Sep 2026 14:00 EST Tue, 01 Sep 2026 18:00 EST Mon, 31 Aug 2026 13:38 EST Mon, 31 Aug 2026 13:38 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11808374 Day-Ahead - Save on Energy DR Scheduled Mon, 31 Aug 2026 08:41 EST 11808374 258597 1 Day-Ahead - Save on Energy DR Scheduled Demand Response Programs totaling 187 MWs have been scheduled. The Ontario Demand Forecast has been adjusted over the activation period. Tue, 01 Sep 2026 16:00 EST Tue, 01 Sep 2026 19:00 EST Mon, 31 Aug 2026 08:41 EST Mon, 31 Aug 2026 08:41 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11808371 Conservative Operating State Mon, 31 Aug 2026 08:35 EST 11808371 258596 1 Conservative Operating State The IESO has declared a Conservative Operating State due to extreme heat. The IESO may take actions to recall outages or suspend switching to maintain reliability. Tue, 01 Sep 2026 09:00 EST Wed, 02 Sep 2026 21:00 EST Mon, 31 Aug 2026 08:35 EST Mon, 31 Aug 2026 08:35 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11784571 HE23 Run of Pre-Dispatch Completed Successfully Sat, 29 Aug 2026 22:28 EST 11784571 258589 1 HE23 Run of Pre-Dispatch Completed Successfully Pre-dispatch is running normally and IESO is no longer using the HE20 results. Sat, 29 Aug 2026 22:25 EST Sat, 29 Aug 2026 23:00 EST Sat, 29 Aug 2026 22:28 EST Sat, 29 Aug 2026 22:28 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11784572 HE21 Run of Pre-Dispatch Declared Invalid Sat, 29 Aug 2026 22:28 EST 11784572 258588 2 HE21 Run of Pre-Dispatch Declared Invalid Due to technical difficulties, the HE21 pre-dispatch results have been declared invalid. IESO will use the pre-dispatch result from HE20 until this issue is resolved. We will notify you once updated pre-dispatch results are available. Sat, 29 Aug 2026 19:55 EST Sat, 29 Aug 2026 22:28 EST Sat, 29 Aug 2026 20:01 EST Sat, 29 Aug 2026 22:28 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11784569 HE21 Run of Pre-Dispatch Declared Invalid Sat, 29 Aug 2026 20:01 EST 11784569 258588 1 HE21 Run of Pre-Dispatch Declared Invalid Due to technical difficulties, the HE21 pre-dispatch results have been declared invalid. IESO will use the pre-dispatch result from HE20 until this issue is resolved. We will notify you once updated pre-dispatch results are available. Sat, 29 Aug 2026 19:55 EST Sat, 29 Aug 2026 23:00 EST Sat, 29 Aug 2026 20:01 EST Sat, 29 Aug 2026 20:01 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11784568 Unplanned Market Tool Outage Sat, 29 Aug 2026 19:50 EST 11784568 258587 1 Unplanned Market Tool Outage The IESO is experiencing an unplanned market tool outage. Automated electronic dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as required. Sat, 29 Aug 2026 19:40 EST Sat, 29 Aug 2026 23:00 EST Sat, 29 Aug 2026 19:50 EST Sat, 29 Aug 2026 19:50 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11784570 Unplanned Market Tool Outage Sat, 29 Aug 2026 21:43 EST 11784570 258587 2 Unplanned Market Tool Outage The IESO is experiencing an unplanned market tool outage. Automated electronic dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as required. Sat, 29 Aug 2026 19:40 EST Sat, 29 Aug 2026 21:42 EST Sat, 29 Aug 2026 19:50 EST Sat, 29 Aug 2026 21:43 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11759803 Predispatch Outage Completed Thu, 27 Aug 2026 21:29 EST 11759803 258558 1 Predispatch Outage Completed The 21:07 run of predispatch has completed and has been published. Market Participants are advised to consult the predispatch reports. Thu, 27 Aug 2026 21:28 EST Thu, 27 Aug 2026 22:30 EST Thu, 27 Aug 2026 21:29 EST Thu, 27 Aug 2026 21:29 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11759798 Unplanned Market Tool Outage Thu, 27 Aug 2026 19:55 EST 11759798 258557 1 Unplanned Market Tool Outage The IESO is experiencing an unplanned market tool outage. Automated electronic dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as required. Thu, 27 Aug 2026 19:54 EST Thu, 27 Aug 2026 23:00 EST Thu, 27 Aug 2026 19:55 EST Thu, 27 Aug 2026 19:55 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11759801 Unplanned Market Tool Outage Thu, 27 Aug 2026 21:12 EST 11759801 258557 2 Unplanned Market Tool Outage The IESO is experiencing an unplanned market tool outage. Automated electronic dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as required. Thu, 27 Aug 2026 19:54 EST Thu, 27 Aug 2026 21:12 EST Thu, 27 Aug 2026 19:55 EST Thu, 27 Aug 2026 21:12 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11759800 Predispatch report not published Thu, 27 Aug 2026 20:26 EST 11759800 258556 4 Predispatch report not published The 19:07 and 20:07 Predispatch Report will not be published due to unplanned market tool outage. Please refer to the last published version of the report. Thu, 27 Aug 2026 19:33 EST Thu, 27 Aug 2026 21:30 EST Thu, 27 Aug 2026 19:33 EST Thu, 27 Aug 2026 20:26 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11759799 Predispatch report not published Thu, 27 Aug 2026 20:07 EST 11759799 258556 3 Predispatch report not published The 19:07 Predispatch Report will not be published due to unplanned market tool outage. Please refer to the last published version of the report. Thu, 27 Aug 2026 19:33 EST Thu, 27 Aug 2026 21:07 EST Thu, 27 Aug 2026 19:33 EST Thu, 27 Aug 2026 20:07 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11759802 Predispatch report not published Thu, 27 Aug 2026 21:14 EST 11759802 258556 5 Predispatch report not published The 19:07 and 20:07 Predispatch Report will not be published due to unplanned market tool outage. Please refer to the last published version of the report. Thu, 27 Aug 2026 19:33 EST Thu, 27 Aug 2026 22:30 EST Thu, 27 Aug 2026 19:33 EST Thu, 27 Aug 2026 21:14 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11759796 Predispatch report not published Thu, 27 Aug 2026 19:42 EST 11759796 258556 2 Predispatch report not published The 19:07 Predispatch Report will not be published due to unplanned market tool outage. Please refer to the last published version of the report. Thu, 27 Aug 2026 19:33 EST Thu, 27 Aug 2026 20:07 EST Thu, 27 Aug 2026 19:33 EST Thu, 27 Aug 2026 19:42 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11759795 Predispatch report not published Thu, 27 Aug 2026 19:33 EST 11759795 258556 1 Predispatch report not published The 19:07 Predispatch Report will not be published due to unplanned market tool outage. Please refer to the last published version of the report. Thu, 27 Aug 2026 19:33 EST Thu, 27 Aug 2026 20:00 EST Thu, 27 Aug 2026 19:33 EST Thu, 27 Aug 2026 19:33 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11759804 Predispatch report not published Thu, 27 Aug 2026 21:29 EST 11759804 258556 6 Predispatch report not published The 19:07 and 20:07 Predispatch Report will not be published due to unplanned market tool outage. Please refer to the last published version of the report. Thu, 27 Aug 2026 19:33 EST Thu, 27 Aug 2026 21:29 EST Thu, 27 Aug 2026 19:33 EST Thu, 27 Aug 2026 21:29 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11759797 Unplanned Market Tool Outage Thu, 27 Aug 2026 19:47 EST 11759797 258555 2 Unplanned Market Tool Outage The IESO is experiencing an unplanned market tool outage. Automated electronic dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as required. Thu, 27 Aug 2026 19:23 EST Thu, 27 Aug 2026 19:40 EST Thu, 27 Aug 2026 19:24 EST Thu, 27 Aug 2026 19:47 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11759794 Unplanned Market Tool Outage Thu, 27 Aug 2026 19:24 EST 11759794 258555 1 Unplanned Market Tool Outage The IESO is experiencing an unplanned market tool outage. Automated electronic dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as required. Thu, 27 Aug 2026 19:23 EST Thu, 27 Aug 2026 23:59 EST Thu, 27 Aug 2026 19:24 EST Thu, 27 Aug 2026 19:24 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11697046 Dispatch Service Sat, 22 Aug 2026 02:57 EST 11697046 258348 1 Dispatch Service Automated dispatch instructions sent via Dispatch Service were briefly unavailable, but have since been restored. Users may have been disconnected and will need to login to reconnect. Sat, 22 Aug 2026 02:56 EST Sat, 22 Aug 2026 04:00 EST Sat, 22 Aug 2026 02:57 EST Sat, 22 Aug 2026 02:57 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11722144 EMI Mon, 24 Aug 2026 14:47 EST 11722144 258228 2 EMI Energy Market Interface (EMI) will be unavailable. EMI is the Web UI component of the Market Information Management (MIM) solution used to submit dispatch data. Users may get disconnected and will need to login and verify access eMIM API will be unavailable. eMIM is the MIM Application Programming Interface used to submit dispatch data. Users may get disconnected and will need to login and verify access. Mon, 24 Aug 2026 14:30 EST Mon, 24 Aug 2026 14:47 EST Thu, 20 Aug 2026 10:28 EST Mon, 24 Aug 2026 14:47 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11672252 EMI Thu, 20 Aug 2026 10:28 EST 11672252 258228 1 EMI Energy Market Interface (EMI) will be unavailable. EMI is the Web UI component of the Market Information Management (MIM) solution used to submit dispatch data. Users may get disconnected and will need to login and verify access eMIM API will be unavailable. eMIM is the MIM Application Programming Interface used to submit dispatch data. Users may get disconnected and will need to login and verify access. Mon, 24 Aug 2026 14:30 EST Mon, 24 Aug 2026 15:00 EST Thu, 20 Aug 2026 10:28 EST Thu, 20 Aug 2026 10:28 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11647115 Online IESO Tue, 18 Aug 2026 11:48 EST 11647115 258027 1 Online IESO Due to planned outage Online IESO will not be available. This includes the following applications: Registration Automation System – Manage organization registration and participant authorization, Facility registration and Meter Installation processes Notice of Disagreement (NOD) – Manage the process with participants related to settlement and invoicing concerns Meter Trouble Report (MTR) - Manage the process related to correcting revenue meter errors Meter Data Management (MDM) – Manage meter data report profiles and submit ad-hoc meter data requests Prudential System - Submit Prudential Support Information Capacity Auction – Submit Capacity Qualification and Demand Response Auction Offer Reliability Compliance Tool - Manage the process of collecting submittals from participants related to NERC reliability standards Enable Capacity Export – Give the market participant the ability to sell excess capacity to neighboring jurisdictions Online Settlement Forms - Collect market participant data required to settle the market Audit Revenue Metering Installation – Add, delete, or modify existing findings, actions, and finding classifications DR Metering Audit – Submit Demand Response metering audit Manage Contributor – Manage Demand Response Contributor Registry information Non-Compliance Report – Self-report possible breaches of the market rules CDM Plan and Measures - Used by LDCs and IESO to collaborate on changes to the LDC CDM Plans Retrofit - Manage Conservation Retrofit program and Restful API to interact with Retrofit program Industrial Energy Efficiency Program (IEEP) - Support customers across Ontario in improving their industrial processes and implementing system optimization projects Beacon – Manage the process with external suppliers related to FIT and microFIT contract management Transmission Rights Auction (TRA) – Manage auctions and allow market participants to submit bids in the TR market Market Power Mitigation (MPM) – Manage registered reference levels and reference quantities, and submit temporary reference level change requests Wed, 19 Aug 2026 19:30 EST Wed, 19 Aug 2026 22:00 EST Tue, 18 Aug 2026 11:48 EST Tue, 18 Aug 2026 11:48 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11610753 Generation Biasing Sat, 15 Aug 2026 07:10 EST 11610753 257976 1 Generation Biasing Generation Biasing may be required to facilitate the switching on circuit X1P. Sun, 16 Aug 2026 09:00 EST Sun, 16 Aug 2026 10:00 EST Sat, 15 Aug 2026 07:10 EST Sat, 15 Aug 2026 07:10 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11586061 EMI Thu, 13 Aug 2026 12:43 EST 11586061 257941 2 EMI Energy Market Interface (EMI) will be unavailable. EMI is the Web UI component of the Market Information Management (MIM) solution used to submit dispatch data. Users may get disconnected and will need to login and verify access eMIM API will be unavailable. eMIM is the MIM Application Programming Interface used to submit dispatch data. Users may get disconnected and will need to login and verify access. Thu, 13 Aug 2026 12:15 EST Thu, 13 Aug 2026 12:43 EST Thu, 13 Aug 2026 07:25 EST Thu, 13 Aug 2026 12:43 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11585779 EMI Thu, 13 Aug 2026 07:25 EST 11585779 257941 1 EMI Energy Market Interface (EMI) will be unavailable. EMI is the Web UI component of the Market Information Management (MIM) solution used to submit dispatch data. Users may get disconnected and will need to login and verify access eMIM API will be unavailable. eMIM is the MIM Application Programming Interface used to submit dispatch data. Users may get disconnected and will need to login and verify access. Thu, 13 Aug 2026 12:15 EST Thu, 13 Aug 2026 13:00 EST Thu, 13 Aug 2026 07:25 EST Thu, 13 Aug 2026 07:25 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11573810 Dispatch Service Wed, 12 Aug 2026 14:49 EST 11573810 257933 1 Dispatch Service Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage. Users may get disconnected and will need to login and verify access (MP action may be required). Thu, 13 Aug 2026 10:25 EST Thu, 13 Aug 2026 10:40 EST Wed, 12 Aug 2026 14:49 EST Wed, 12 Aug 2026 14:49 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11573809 EMI Wed, 12 Aug 2026 14:47 EST 11573809 257904 2 EMI Energy Market Interface (EMI) will be unavailable. EMI is the Web UI component of the Market Information Management (MIM) solution used to submit dispatch data. Users may get disconnected and will need to login and verify access eMIM API will be unavailable. eMIM is the MIM Application Programming Interface used to submit dispatch data. Users may get disconnected and will need to login and verify access. Thu, 13 Aug 2026 14:40 EST Wed, 12 Aug 2026 14:47 EST Wed, 12 Aug 2026 05:18 EST Wed, 12 Aug 2026 14:47 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11573246 EMI Wed, 12 Aug 2026 05:18 EST 11573246 257904 1 EMI Energy Market Interface (EMI) will be unavailable. EMI is the Web UI component of the Market Information Management (MIM) solution used to submit dispatch data. Users may get disconnected and will need to login and verify access eMIM API will be unavailable. eMIM is the MIM Application Programming Interface used to submit dispatch data. Users may get disconnected and will need to login and verify access. Thu, 13 Aug 2026 14:40 EST Thu, 13 Aug 2026 14:45 EST Wed, 12 Aug 2026 05:18 EST Wed, 12 Aug 2026 05:18 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11561213 IESO Reports Site Tue, 11 Aug 2026 13:39 EST 11561213 257903 1 IESO Reports Site Due to an uplanned IT outage, some market participant private/public reports could be delayed being published this hour. Tue, 11 Aug 2026 13:30 EST Tue, 11 Aug 2026 14:00 EST Tue, 11 Aug 2026 13:39 EST Tue, 11 Aug 2026 13:39 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11536812 EMI/EMAT - Unplanned Market Tool Outage Sun, 09 Aug 2026 08:35 EST 11536812 257869 1 EMI/EMAT - Unplanned Market Tool Outage The IESO is experiencing tool issues with the EMI/EMAT application. IT personnel are currently investigating. Energy Market Interface (EMI) will be unavailable at 08:40-08:50. EMI is the Web UI component of the Market Information Management (MIM) solution used to submit dispatch data. Users may get disconnected and will need to login and verify access eMIM API will be unavailable. eMIM is the MIM Application Programming Interface used to submit dispatch data. Users may get disconnected and will need to login and verify access. Sun, 09 Aug 2026 08:35 EST Sun, 09 Aug 2026 09:35 EST Sun, 09 Aug 2026 08:35 EST Sun, 09 Aug 2026 08:35 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11524967 IESO Operating from Backup Control Centre Sat, 08 Aug 2026 09:00 EST 11524967 257818 2 IESO Operating from Backup Control Centre The IESO has transferred operating control to its Backup Control Centre (BCC) at 16:57 (EST). Telephone contact numbers will remain unchanged, except MSAT and Iridium Satellite phone numbers. Please use alternate/backup MSAT, Iridium Satellite and Fax numbers if required. Operating control will be returned to the Primary Control Centre on Sunday August 14, 2026 at 18:00 (EST). Thu, 06 Aug 2026 16:57 EST Fri, 14 Aug 2026 18:00 EST Thu, 06 Aug 2026 17:08 EST Sat, 08 Aug 2026 09:00 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11499143 IESO Operating from Backup Control Centre Thu, 06 Aug 2026 17:08 EST 11499143 257818 1 IESO Operating from Backup Control Centre The IESO has transferred operating control to its Backup Control Centre (BCC) at 16:57 (EST). Telephone contact numbers will remain unchanged, except MSAT and Iridium Satellite phone numbers. Please use alternate/backup MSAT, Iridium Satellite and Fax numbers if required. Operating control will be returned to the Primary Control Centre on Sunday August 9, 2026 at 06:00 (EST). Thu, 06 Aug 2026 16:57 EST Sun, 09 Aug 2026 06:00 EST Thu, 06 Aug 2026 17:08 EST Thu, 06 Aug 2026 17:08 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11496596 Real-Time - Save on Energy DR Scheduled Thu, 06 Aug 2026 08:57 EST 11496596 257812 1 Real-Time - Save on Energy DR Scheduled Demand Response Programs totaling 170 MWs have been scheduled. The Ontario Demand Forecast has not been adjusted over the activation period. Thu, 06 Aug 2026 16:00 EST Thu, 06 Aug 2026 19:00 EST Thu, 06 Aug 2026 08:57 EST Thu, 06 Aug 2026 08:57 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11470260 Market Tool Outage - OMB Tue, 04 Aug 2026 16:13 EST 11470260 257746 1 Market Tool Outage - OMB 13:15 - 13:45 EDT Dispatch Service: Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage. Users may get disconnected and will need to login and verify access (MP action may be required). 13:15 - 13:45 EDT ICCP: The Inter-Control Center Communication Protocol (ICCP) link to IESO will be unavailable. 13:15 - 13:45 EDT IESO Reports Site: Confidential Report publication will be delayed. Public Report publication will be delayed. 13:15 - 13:45 EDT UCM: Commitment notifications will not be issued. 14:00 - 14:10 EDT IESO Reports Site: The Adequacy report will not be published. 14:00 - 15:00 EDT IESO Reports Site: The Predispatch report will not be published. Tue, 04 Aug 2026 13:00 EST Wed, 05 Aug 2026 15:00 EST Tue, 04 Aug 2026 16:13 EST Tue, 04 Aug 2026 16:13 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11470495 Market Tool Outage - OMB Tue, 04 Aug 2026 18:00 EST 11470495 257746 2 Market Tool Outage - OMB 13:15 - 13:45 EDT Dispatch Service: Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage. Users may get disconnected and will need to login and verify access (MP action may be required). 13:15 - 13:45 EDT ICCP: The Inter-Control Center Communication Protocol (ICCP) link to IESO will be unavailable. 13:15 - 13:45 EDT IESO Reports Site: Confidential Report publication will be delayed. Public Report publication will be delayed. 13:15 - 13:45 EDT UCM: Commitment notifications will not be issued. 14:00 - 14:10 EDT IESO Reports Site: The Adequacy report will not be published. 14:00 - 15:00 EDT IESO Reports Site: The Predispatch report will not be published. Wed, 05 Aug 2026 13:00 EST Wed, 05 Aug 2026 15:00 EST Tue, 04 Aug 2026 16:13 EST Tue, 04 Aug 2026 18:00 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11468448 Day-Ahead - Save on Energy DR Scheduled Tue, 04 Aug 2026 07:57 EST 11468448 257690 1 Day-Ahead - Save on Energy DR Scheduled Demand Response Programs totaling 191 MWs have been scheduled. The Ontario Demand Forecast has been adjusted over the activation period. Wed, 05 Aug 2026 16:00 EST Wed, 05 Aug 2026 19:00 EST Tue, 04 Aug 2026 07:57 EST Tue, 04 Aug 2026 07:57 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11456553 MBSK Commercially Unavailable Mon, 03 Aug 2026 08:34 EST 11456553 257679 1 MBSK Commercially Unavailable With SK1 O/S, MBSK will be commercially unavailable. Any participant that submits bids/offers will have their schedules curtailed to 0 MW and will be subject to failure charges Tue, 04 Aug 2026 19:00 EST Tue, 04 Aug 2026 20:00 EST Mon, 03 Aug 2026 08:34 EST Mon, 03 Aug 2026 08:34 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11420637 Generation Biasing Fri, 31 Jul 2026 23:05 EST 11420637 257621 1 Generation Biasing Generation Biasing may be required to facilitate the switching on circuit H24S. Sun, 02 Aug 2026 10:00 EST Sun, 02 Aug 2026 11:00 EST Fri, 31 Jul 2026 23:05 EST Fri, 31 Jul 2026 23:05 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11419364 Generation Biasing Fri, 31 Jul 2026 11:01 EST 11419364 257528 2 Generation Biasing Generation Biasing may be required to facilitate the switching on circuit H24S. Sun, 02 Aug 2026 10:00 EST Fri, 31 Jul 2026 11:00 EST Wed, 29 Jul 2026 09:57 EST Fri, 31 Jul 2026 11:01 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11394276 Generation Biasing Wed, 29 Jul 2026 09:57 EST 11394276 257528 1 Generation Biasing Generation Biasing may be required to facilitate the switching on circuit H24S. Sun, 02 Aug 2026 10:00 EST Sun, 02 Aug 2026 10:15 EST Wed, 29 Jul 2026 09:57 EST Wed, 29 Jul 2026 09:57 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11394205 Market Tools Planned Maintenance Wed, 29 Jul 2026 08:13 EST 11394205 257527 1 Market Tools Planned Maintenance Due to planned maintenance, automated dispatch instructions may be unavailable. It is possible that at least 3 MIO runs (5 minute dispatches) may be missed. The IESO will manually dispatch by phone as required. Wed, 29 Jul 2026 15:33 EST Wed, 29 Jul 2026 15:43 EST Wed, 29 Jul 2026 08:13 EST Wed, 29 Jul 2026 08:13 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11394204 Market Tools Planned Maintenance Wed, 29 Jul 2026 08:12 EST 11394204 257526 1 Market Tools Planned Maintenance Due to planned maintenance, automated dispatch instructions will be unavailable. It is possible that at least 2 MIO runs (5 minute dispatches) may be missed. The IESO will manually dispatch by phone as required. Wed, 29 Jul 2026 14:20 EST Wed, 29 Jul 2026 14:25 EST Wed, 29 Jul 2026 08:12 EST Wed, 29 Jul 2026 08:12 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11419370 Generation Biasing Fri, 31 Jul 2026 11:07 EST 11419370 257525 2 Generation Biasing Generation biasing may be required to facilitate planned switching for Chenaux T3. Fri, 31 Jul 2026 16:00 EST Fri, 31 Jul 2026 11:07 EST Tue, 28 Jul 2026 22:44 EST Fri, 31 Jul 2026 11:07 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11382311 Generation Biasing Tue, 28 Jul 2026 22:44 EST 11382311 257525 1 Generation Biasing Generation biasing may be required to facilitate planned switching for Chenaux T3. Fri, 31 Jul 2026 16:00 EST Fri, 31 Jul 2026 16:30 EST Tue, 28 Jul 2026 22:44 EST Tue, 28 Jul 2026 22:44 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11382224 TEST Advisory Tue, 28 Jul 2026 12:25 EST 11382224 257510 2 TEST Advisory Test Advisory to publish to Day 1 Wed, 29 Jul 2026 21:00 EST Tue, 28 Jul 2026 12:25 EST Tue, 28 Jul 2026 11:25 EST Tue, 28 Jul 2026 12:25 EST Warning http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11382129 TEST Advisory Tue, 28 Jul 2026 11:25 EST 11382129 257510 1 TEST Advisory Test Advisory to publish to Day 1 Wed, 29 Jul 2026 21:00 EST Wed, 29 Jul 2026 22:00 EST Tue, 28 Jul 2026 11:25 EST Tue, 28 Jul 2026 11:25 EST Warning http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11382128 TEST Advisory Tue, 28 Jul 2026 11:24 EST 11382128 257509 1 TEST Advisory Test Advisory to publish to Day 1 Wed, 29 Jul 2026 01:00 EST Wed, 29 Jul 2026 02:00 EST Tue, 28 Jul 2026 11:24 EST Tue, 28 Jul 2026 11:24 EST Warning http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11382223 TEST Advisory Tue, 28 Jul 2026 12:25 EST 11382223 257509 2 TEST Advisory Test Advisory to publish to Day 1 Wed, 29 Jul 2026 01:00 EST Tue, 28 Jul 2026 12:25 EST Tue, 28 Jul 2026 11:24 EST Tue, 28 Jul 2026 12:25 EST Warning http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11381958 Transmission Rights Auction (TRA) will be unavailable Tue, 28 Jul 2026 06:28 EST 11381958 257479 1 Transmission Rights Auction (TRA) will be unavailable Transmission Rights Auction (TRA) will be unavailable Wed, 29 Jul 2026 02:40 EST Wed, 29 Jul 2026 03:25 EST Tue, 28 Jul 2026 06:28 EST Tue, 28 Jul 2026 06:28 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11370123 Outage Coordination and Scheduling System (OCSS) - CROW Web Interface Mon, 27 Jul 2026 19:39 EST 11370123 257478 1 Outage Coordination and Scheduling System (OCSS) - CROW Web Interface OCSS Web User Interface will be unavailable for outage submission and retrieval. Mon, 27 Jul 2026 20:30 EST Mon, 27 Jul 2026 21:15 EST Mon, 27 Jul 2026 19:39 EST Mon, 27 Jul 2026 19:39 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11369817 Transmission Rights Auction (TRA) will be unavailable Mon, 27 Jul 2026 11:52 EST 11369817 257453 1 Transmission Rights Auction (TRA) will be unavailable Transmission Rights Auction (TRA) will be unavailable Tue, 28 Jul 2026 02:40 EST Tue, 28 Jul 2026 03:25 EST Mon, 27 Jul 2026 11:52 EST Mon, 27 Jul 2026 11:52 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11369816 Transmission Rights Auction (TRA) will be unavailable Mon, 27 Jul 2026 11:51 EST 11369816 257452 1 Transmission Rights Auction (TRA) will be unavailable Transmission Rights Auction (TRA) will be unavailable Tue, 28 Jul 2026 01:35 EST Tue, 28 Jul 2026 02:10 EST Mon, 27 Jul 2026 11:51 EST Mon, 27 Jul 2026 11:51 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11369815 EMI Mon, 27 Jul 2026 11:50 EST 11369815 257451 1 EMI Energy Market Interface (EMI) will be unavailable. EMI is the Web UI component of the Market Information Management (MIM) solution used to submit dispatch data. Users may get disconnected and will need to login and verify access eMIM API will be unavailable. eMIM is the MIM Application Programming Interface used to submit dispatch data. Users may get disconnected and will need to login and verify access. Tue, 28 Jul 2026 01:35 EST Tue, 28 Jul 2026 02:10 EST Mon, 27 Jul 2026 11:50 EST Mon, 27 Jul 2026 11:50 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11382310 Dispatch Service Tue, 28 Jul 2026 17:10 EST 11382310 257450 2 Dispatch Service Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage. Users may get disconnected and will need to login and verify access (MP action may be required). Tue, 28 Jul 2026 20:20 EST Tue, 28 Jul 2026 20:40 EST Mon, 27 Jul 2026 11:48 EST Tue, 28 Jul 2026 17:10 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11369814 Dispatch Service Mon, 27 Jul 2026 11:48 EST 11369814 257450 1 Dispatch Service Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage. Users may get disconnected and will need to login and verify access (MP action may be required). Tue, 28 Jul 2026 20:20 EST Tue, 28 Jul 2026 20:39 EST Mon, 27 Jul 2026 11:48 EST Mon, 27 Jul 2026 11:48 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11369813 Dispatch Service Mon, 27 Jul 2026 11:46 EST 11369813 257449 1 Dispatch Service Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage. Users may get disconnected and will need to login and verify access (MP action may be required). Tue, 28 Jul 2026 01:35 EST Tue, 28 Jul 2026 02:10 EST Mon, 27 Jul 2026 11:46 EST Mon, 27 Jul 2026 11:46 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11370124 Dispatch Service Tue, 28 Jul 2026 00:25 EST 11370124 257449 2 Dispatch Service Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage. Users may get disconnected and will need to login and verify access (MP action may be required). Tue, 28 Jul 2026 01:35 EST Tue, 28 Jul 2026 02:10 EST Mon, 27 Jul 2026 11:46 EST Tue, 28 Jul 2026 00:25 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11369812 Online IESO Mon, 27 Jul 2026 11:35 EST 11369812 257448 1 Online IESO Due to planned outage Online IESO will not be available. This includes the following applications: Registration Automation System – Manage organization registration and participant authorization, Facility registration and Meter Installation processes Notice of Disagreement (NOD) – Manage the process with participants related to settlement and invoicing concerns Meter Trouble Report (MTR) - Manage the process related to correcting revenue meter errors Meter Data Management (MDM) – Manage meter data report profiles and submit ad-hoc meter data requests Prudential System - Submit Prudential Support Information Capacity Auction – Submit Capacity Qualification and Demand Response Auction Offer Reliability Compliance Tool - Manage the process of collecting submittals from participants related to NERC reliability standards Enable Capacity Export – Give the market participant the ability to sell excess capacity to neighboring jurisdictions Online Settlement Forms - Collect market participant data required to settle the market Audit Revenue Metering Installation – Add, delete, or modify existing findings, actions, and finding classifications DR Metering Audit – Submit Demand Response metering audit Manage Contributor – Manage Demand Response Contributor Registry information Non-Compliance Report – Self-report possible breaches of the market rules CDM Plan and Measures - Used by LDCs and IESO to collaborate on changes to the LDC CDM Plans Retrofit - Manage Conservation Retrofit program and Restful API to interact with Retrofit program Industrial Energy Efficiency Program (IEEP) - Support customers across Ontario in improving their industrial processes and implementing system optimization projects Beacon – Manage the process with external suppliers related to FIT and microFIT contract management Transmission Rights Auction (TRA) – Manage auctions and allow market participants to submit bids in the TR market Market Power Mitigation (MPM) – Manage registered reference levels and reference quantities, and submit temporary reference level change requests Tue, 28 Jul 2026 01:35 EST Tue, 28 Jul 2026 02:10 EST Mon, 27 Jul 2026 11:35 EST Mon, 27 Jul 2026 11:35 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11370122 Outage Coordination and Scheduling System (OCSS) - CROW Web Interface Mon, 27 Jul 2026 19:15 EST 11370122 257432 2 Outage Coordination and Scheduling System (OCSS) - CROW Web Interface OCSS Web User Interface will be unavailable for outage submission and retrieval. Mon, 27 Jul 2026 20:30 EST Mon, 27 Jul 2026 21:15 EST Fri, 24 Jul 2026 15:38 EST Mon, 27 Jul 2026 19:15 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=11334006 Outage Coordination and Scheduling System (OCSS) - CROW Web Interface Fri, 24 Jul 2026 15:38 EST 11334006 257432 1 Outage Coordination and Scheduling System (OCSS) - CROW Web Interface OCSS Web User Interface will be unavailable for outage submission and retrieval. Mon, 27 Jul 2026 20:30 EST Mon, 27 Jul 2026 21:15 EST Fri, 24 Jul 2026 15:38 EST Fri, 24 Jul 2026 15:38 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9034010 IESO Operating Back At Primary Control Center Sun, 25 Jan 2026 17:52 EST 9034010 249736 1 IESO Operating Back At Primary Control Center The IESO (Ontario) has transferred operational control back to its Primary Control Center (PCC). Sun, 25 Jan 2026 17:45 EST Thu, 31 Dec 2026 23:59 EST Sun, 25 Jan 2026 17:52 EST Sun, 25 Jan 2026 17:52 EST Alert