Planned IT Outages

All planned IT system outages are posted as soon as they are scheduled. Participants can view outage notification details for the same day, as well as outages planned in the future.

Participants can also view information about outages that occurred in the past 60 days by selecting Archive in the table below.

Planned Outages for 24/06/2017

Outage Times	System(s)	Description
There are no scheduled outages.

Future Outages

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Archive

Outage Times	System(s)	Description

Outage Times	System(s)	Description
April 5, 2017
09:00 - 09:20 EST		IESO Sandbox Portal and testing for the the following applications will be unavailable: Transmission Rights Auction (TRA ) application Settlements Online Forms Metering (MVWeb) MIM API Online Outage Request Form (ONLORF) Prudential Manager Sandbox Transmission Rights Auction (TRA) will be unavailableSandbox All on-line collaboration communities will be unavailableSandbox Settlements Online Forms cannot be submitted or retrievedSandbox Reliability Compliance Tool used for self-certifications and self-reports will be unavailableSandbox Online Outage Request Form used for submitting or retrieving outages will be unavailableSandbox Prudential Manager used to monitor and retrieve prudential information will be unavailable Sandbox IESO Online, used for various registration processes will not be available during the outage. The registration processes are: Requesting access to the IESO systems Managing your organization's contact information Managing your information Managing your organization's information (Emergency preparedness plans, Licences, Banking information and general information) Requesting authorization to an IESO administered market or program Cancelling a request for authorization
April 13, 2017
11:00 - 11:30 EST	Outage Coordination and Scheduling System (OCSS) - CROW Web Interface	Hydro One and Ontario Power Generation cannot submit or retrieve outages through IOMSOCSS Web User Interface will be unavailable for outage submission and retrieval.
April 18, 2017
09:15 - 09:30 EST	Online IESO	Due to planned outages the following actions will not be available in Online IESO: create a Meter Trouble Report
April 19, 2017
10:40 - 10:44 EST	Online IESO	Due to planned outages the following actions will not be available in Online IESO: create a Meter Trouble Report Due to planned outages the following actions will not be available in Online IESO: create a Notice of Disagreement (NOD) Reliability Compliance Tool used for self-certifications and self-reports will be unavailable
12:15 - 12:45 EST	Message Exchange	Loss of access to Message Exchange will result in the following applications being impacted: Automated dispatch instructions will be unavailable. The IESO will manually dispatch by phone as necessary. Administrative pricing will be used. Pre-dispatch and dispatch schedules and prices may not be updated.
12:15 - 16:30 EST	Day-Ahead Optimization System (DAOS)	The Eligible Energy Limited Resource Optimization (EELR) run of the Day-Ahead Commitment Process (DACP) DAOS will not occur: EELRs will be unable to resubmit their offers for consideration in the DACP after the initial DAOS run If the initial DAOS run is successful, it will be considered the Schedule of Record
11:45 - 11:49 EST	Online IESO	Due to planned outages the following actions will not be available in Online IESO: create a Meter Trouble Report Due to planned outages the following actions will not be available in Online IESO: create a Notice of Disagreement (NOD) Reliability Compliance Tool used for self-certifications and self-reports will be unavailable
09:30 - 09:35 EST	IESO Portal	Settlements Online Forms cannot be submitted or retrieved
April 25, 2017
12:00 - 16:00 EST	Day-Ahead Optimization System (DAOS)	The Eligible Energy Limited Resource Optimization (EELR) run of the Day-Ahead Commitment Process (DACP) DAOS will not occur: EELRs will be unable to resubmit their offers for consideration in the DACP after the initial DAOS run If the initial DAOS run is successful, it will be considered the Schedule of Record
April 26, 2017
11:20 - 11:30	MIM API	EMI application used to submit bids, offers, schedules and forecast will be unavailable.Energy Market/API application used to submit bids, offers, schedules and forecast will be unavailable.MIM Web services used to submit bids, offers, schedules and forecast will be unavailable. MIM IDK used to submit bids, offers, schedules and forecast will be unavailable.
13:20 - 13:30	MIM API	MIM Web services used to submit bids, offers, schedules and forecast will be unavailable. MIM IDK used to submit bids, offers, schedules and forecast will be unavailable.EMI application used to submit bids, offers, schedules and forecast will be unavailable.Energy Market/API application used to submit bids, offers, schedules and forecast will be unavailable.
April 27, 2017
010:20 - 10:40 EST	IESO Portal	Loss of access to the IESO Portal will impact the following applications: Transmission Rights Auction (TRA) application will be unavailable All on-line collaboration communities will be unavailable Settlements Online Forms cannot be submitted or retrieved Prudential Manager used to monitor and retrieve prudential information will be unavailable Loss of access to the IESO Portal will impact the following applications: Transmission Rights Auction (TRA) application will be unavailable All on-line collaboration communities will be unavailable Settlements Online Forms cannot be submitted or retrieved Prudential Manager used to monitor and retrieve prudential information will be unavailable EMI application used to submit bids, offers, schedules and forecasts will be unavailable. Market participants should confirm their bids and offers once the outage is completed. IESO Online, used for various registration processes will not be available during the outage. The registration processes are: Requesting access to the IESO systems Managing your organization's contact information Managing your information Managing your organization's information (Emergency preparedness plans, Licences, Banking information and general information) Requesting authorization to an IESO administered market or program Cancelling a request for authorization Settlements Online Forms cannot be submitted or retrievedTransmission Rights Auction (TRA) will be unavailableAll on-line collaboration communities will be unavailableOnline Outage Request Form used for submitting or retrieving outages will be unavailablePrudential Manager used to monitor and retrieve prudential information will be unavailableMeter data cannot be retrieved.Offers and claims for the Emergency Load Reduction Program (ELRP) cannot be submitted.
12:20 - 12:50 EST	IESO Portal	Loss of access to the IESO Portal will impact the following applications: Transmission Rights Auction (TRA) application will be unavailable All on-line collaboration communities will be unavailable Settlements Online Forms cannot be submitted or retrieved Prudential Manager used to monitor and retrieve prudential information will be unavailable Loss of access to the IESO Portal will impact the following applications: Transmission Rights Auction (TRA) application will be unavailable All on-line collaboration communities will be unavailable Settlements Online Forms cannot be submitted or retrieved Prudential Manager used to monitor and retrieve prudential information will be unavailable EMI application used to submit bids, offers, schedules and forecasts will be unavailable. Market participants should confirm their bids and offers once the outage is completed. IESO Online, used for various registration processes will not be available during the outage. The registration processes are: Requesting access to the IESO systems Managing your organization's contact information Managing your information Managing your organization's information (Emergency preparedness plans, Licences, Banking information and general information) Requesting authorization to an IESO administered market or program Cancelling a request for authorization Settlements Online Forms cannot be submitted or retrievedTransmission Rights Auction (TRA) will be unavailableAll on-line collaboration communities will be unavailableOnline Outage Request Form used for submitting or retrieving outages will be unavailablePrudential Manager used to monitor and retrieve prudential information will be unavailableMeter data cannot be retrieved.Offers and claims for the Emergency Load Reduction Program (ELRP) cannot be submitted.
June 7, 2017
13:25 - 13:55 EST	Message Exchange	Loss of access to Message Exchange will result in the following applications being impacted: Automated dispatch instructions will be unavailable. The IESO will manually dispatch by phone as necessary. Administrative pricing will be used. Pre-dispatch and dispatch schedules and prices may not be updated.
June 21, 2017
12:15 - 16:30 EST	Day-Ahead Optimization System (DAOS)	The Eligible Energy Limited Resource Optimization (EELR) run of the Day-Ahead Commitment Process (DACP) DAOS will not occur: EELRs will be unable to resubmit their offers for consideration in the DACP after the initial DAOS run If the initial DAOS run is successful, it will be considered the Schedule of Record
12:15 - 12:45 EST	Message Exchange	Loss of access to Message Exchange will result in the following applications being impacted: Automated dispatch instructions will be unavailable. The IESO will manually dispatch by phone as necessary. Administrative pricing will be used. Pre-dispatch and dispatch schedules and prices may not be updated.
13:00 - 13:07 EST	Report Site	The 13:07 Predispatch report will not be published.
June 19, 2017
09:00 - 09:15 EST	IESO Portal	Settlements Online Forms cannot be submitted or retrieved
June 20, 2017
11:10 - 11:25 EST and 15:15- 15:30 EST	IESO Portal	Due to planned outages the following actions will not be available in Online IESO: create a Meter Trouble Report Due to planned outages the following actions will not be available in Online IESO: create a Notice of Disagreement (NOD)
June 22, 2017
09:40 - 09:50 EST and 13:40 - 13:50 EST	Outage Coordination and Scheduling System (OCSS) - CROW Web Interface	Hydro One and Ontario Power Generation cannot submit or retrieve outages through IOMSOCSS Web User Interface will be unavailable for outage submission and retrieval.OCSS Web Service will be unavailable for outage submission and retrieval.
March 8, 2017
09:00 - 10:30	Sandbox Outage Coordination and Scheduling System (OCSS) - Web Service (API)	OCSS Web Service will be unavailable for outage submission and retrieval.
13:00 - 17:00 EST	Day-Ahead Optimization System (DAOS)	The Eligible Energy Limited Resource Optimization (EELR) run of the Day-Ahead Commitment Process (DACP) DAOS will not occur: EELRs will be unable to resubmit their offers for consideration in the DACP after the initial DAOS run If the initial DAOS run is successful, it will be considered the Schedule of Record
13:20 - 14:20	IESO Portal	Loss of access to the IESO Portal will impact the following applications: Transmission Rights Auction (TRA) application will be unavailable All on-line collaboration communities will be unavailable Settlements Online Forms cannot be submitted or retrieved Prudential Manager used to monitor and retrieve prudential information will be unavailable
13:20 - 14:20	Online IESO	Due to planned outage Online IESO will not be available. This includes the following actions: create a Notice of Disagreement (NOD) create a Meter Trouble Report Manage Meter Installation Manage My Information Manage Participation Manage Enrolment Requests Manage System Access Submit Prudential Support Information Update Organization This also includes the following Reliability Compliance Tool actions: Address Compliance Gap Maintain Standards Library Perform IESO Self Certification Report Potential Standards Violation (IESO) Report Potential Standards Violation (MP) Request MP Self Certifications
March 1, 2017
13:25 - 13:29 13:51 - 13:54	Message Exchange	Loss of access to Message Exchange will result in the following applications being impacted: Automated dispatch instructions will be unavailable. The IESO will manually dispatch by phone as necessary. Administrative pricing will be used. Pre-dispatch and dispatch schedules and prices may not be updated.
March 20, 2017
12:20 - 13:20 EST	Advisory Notifications	RSS feeds for Advisory Notifications (Day 0 Advisory Notices, Day 1- 34 Advisory Notices, Emergency Advisory Notices) will stop publishing notices during the outage.
12:15 - 16:30 EST	Day-Ahead Optimization System (DAOS)	The Eligible Energy Limited Resource Optimization (EELR) run of the Day-Ahead Commitment Process (DACP) DAOS will not occur: EELRs will be unable to resubmit their offers for consideration in the DACP after the initial DAOS run If the initial DAOS run is successful, it will be considered the Schedule of Record
12:20 - 13:20 EST	Message Exchange	Loss of access to Message Exchange will result in the following applications being impacted: Automated dispatch instructions will be unavailable. The IESO will manually dispatch by phone as necessary. Administrative pricing will be used. Pre-dispatch and dispatch schedules and prices may not be updated.
12:20 - 13:20 EST	Online IESO	Due to planned outage Online IESO will not be available. This includes the following actions: create a Notice of Disagreement (NOD) create a Meter Trouble Report Manage Meter Installation Manage My Information Manage Participation Manage Enrolment Requests Manage System Access Submit Prudential Support Information Update Organization This also includes the following Reliability Compliance Tool actions: Address Compliance Gap Maintain Standards Library Perform IESO Self Certification Report Potential Standards Violation (IESO) Report Potential Standards Violation (MP) Request MP Self Certifications
12:15 - 13:25 EST	IESO Portal	Loss of access to the IESO Portal will impact the following applications: Transmission Rights Auction (TRA) application will be unavailable All on-line collaboration communities will be unavailable Settlements Online Forms cannot be submitted or retrieved Prudential Manager used to monitor and retrieve prudential information will be unavailable
March 21, 2017
12:20 - 13:20 EST	Advisory Notifications	RSS feeds for Advisory Notifications (Day 0 Advisory Notices, Day 1- 34 Advisory Notices, Emergency Advisory Notices) will stop publishing notices during the outage.
12:15 - 16:30 EST	Day-Ahead Optimization System (DAOS)	The Eligible Energy Limited Resource Optimization (EELR) run of the Day-Ahead Commitment Process (DACP) DAOS will not occur: EELRs will be unable to resubmit their offers for consideration in the DACP after the initial DAOS run If the initial DAOS run is successful, it will be considered the Schedule of Record
12:20 - 13:20 EST	Message Exchange	Loss of access to Message Exchange will result in the following applications being impacted: Automated dispatch instructions will be unavailable. The IESO will manually dispatch by phone as necessary. Administrative pricing will be used. Pre-dispatch and dispatch schedules and prices may not be updated.
12:20 - 13:20 EST	Outage Coordination and Scheduling System (OCSS) - CROW Web Interface	OCSS Web User Interface will be unavailable for outage submission and retrieval.
12:20 - 13:20 EST	Outage Coordination and Scheduling System (OCSS) - Web Service (API)	OCSS Web Service will be unavailable for outage submission and retrieval.
12:20 - 13:20 EST	Online IESO	Due to planned outage Online IESO will not be available. This includes the following actions: create a Notice of Disagreement (NOD) create a Meter Trouble Report Manage Meter Installation Manage My Information Manage Participation Manage Enrolment Requests Manage System Access Submit Prudential Support Information Update Organization This also includes the following Reliability Compliance Tool actions: Address Compliance Gap Maintain Standards Library Perform IESO Self Certification Report Potential Standards Violation (IESO) Report Potential Standards Violation (MP) Request MP Self Certifications
12:15 - 13:25 EST	IESO Portal	Loss of access to the IESO Portal will impact the following applications: Transmission Rights Auction (TRA) application will be unavailable All on-line collaboration communities will be unavailable Settlements Online Forms cannot be submitted or retrieved Prudential Manager used to monitor and retrieve prudential information will be unavailable
March 22, 2017
12:15 - 16:30 EST	Day-Ahead Optimization System (DAOS)	The Eligible Energy Limited Resource Optimization (EELR) run of the Day-Ahead Commitment Process (DACP) DAOS will not occur: EELRs will be unable to resubmit their offers for consideration in the DACP after the initial DAOS run If the initial DAOS run is successful, it will be considered the Schedule of Record
12:15 - 12:45 EST	Message Exchange	Loss of access to Message Exchange will result in the following applications being impacted: Automated dispatch instructions will be unavailable. The IESO will manually dispatch by phone as necessary. Administrative pricing will be used. Pre-dispatch and dispatch schedules and prices may not be updated.
March 23, 2017
11:10 - 12:05 EST	Outage Coordination and Scheduling System (OCSS) - CROW Web Interface	OCSS Web User Interface will be unavailable for outage submission and retrieval.
11:10 - 12:05 EST	Outage Coordination and Scheduling System (OCSS) - Web Service (API)	OCSS Web Service will be unavailable for outage submission and retrieval.
March 27, 2017
12:30 - 12:35 EST 13:35 - 13:40 EST	Outage Coordination and Scheduling System (OCSS) - CROW Web Interface	OCSS Web User Interface will be unavailable for outage submission and retrieval.
12:30 - 12:35 EST 13:35 - 13:40 EST	Outage Coordination and Scheduling System (OCSS) - Web Service (API)	OCSS Web Service will be unavailable for outage submission and retrieval.
March 30, 2017
09:45 - 09:50 EST	IESO Portal	Settlements Online Forms cannot be submitted or retrieved
March 31, 2017
06:30 - 07:00 EST	Outage Coordination and Scheduling System (OCSS) - Web Service (API)	OCSS Web Service will be unavailable for outage submission and retrieval.
March 9, 2017
13:00 - 17:00 EST	Day-Ahead Optimization System (DAOS)	The Eligible Energy Limited Resource Optimization (EELR) run of the Day-Ahead Commitment Process (DACP) DAOS will not occur: EELRs will be unable to resubmit their offers for consideration in the DACP after the initial DAOS run If the initial DAOS run is successful, it will be considered the Schedule of Record
13:20 - 14:20	IESO Portal	Loss of access to the IESO Portal will impact the following applications: Transmission Rights Auction (TRA) application will be unavailable All on-line collaboration communities will be unavailable Settlements Online Forms cannot be submitted or retrieved Prudential Manager used to monitor and retrieve prudential information will be unavailable
13:20 - 14:20	Online IESO	Due to planned outage Online IESO will not be available. This includes the following actions: create a Notice of Disagreement (NOD) create a Meter Trouble Report Manage Meter Installation Manage My Information Manage Participation Manage Enrolment Requests Manage System Access Submit Prudential Support Information Update Organization This also includes the following Reliability Compliance Tool actions: Address Compliance Gap Maintain Standards Library Perform IESO Self Certification Report Potential Standards Violation (IESO) Report Potential Standards Violation (MP) Request MP Self Certifications
March 7, 2017
14:20 - 14:50	Message Exchange	Loss of access to Message Exchange will result in the following applications being impacted: Automated dispatch instructions will be unavailable. The IESO will manually dispatch by phone as necessary. Administrative pricing will be used. Pre-dispatch and dispatch schedules and prices may not be updated.
May 24, 2017
12:15 - 12:45 EST	Message Exchange	Loss of access to Message Exchange will result in the following applications being impacted: Automated dispatch instructions will be unavailable. The IESO will manually dispatch by phone as necessary. Administrative pricing will be used. Pre-dispatch and dispatch schedules and prices may not be updated.
12:15 - 16:30 EST	Day-Ahead Optimization System (DAOS)	The Eligible Energy Limited Resource Optimization (EELR) run of the Day-Ahead Commitment Process (DACP) DAOS will not occur: EELRs will be unable to resubmit their offers for consideration in the DACP after the initial DAOS run If the initial DAOS run is successful, it will be considered the Schedule of Record
May 15, 2017
13:00 – 23:00 EST	All Systems	The IESO is taking steps to mitigate risks associated with the virus named “WannaCry". Users could see service interruptions lasting 10 minutes (in duration for each system) through the balance of the day.
February 14, 2017
13:30 - 14:00	IESO Portal	Loss of access to the IESO Portal will impact the following applications: Transmission Rights Auction (TRA) application will be unavailable All on-line collaboration communities will be unavailable Settlements Online Forms cannot be submitted or retrieved Prudential Manager used to monitor and retrieve prudential information will be unavailable EMI application used to submit bids, offers, schedules and forecasts will be unavailable. Market participants should confirm their bids and offers once the outage is completed. IESO Online, used for various registration processes will not be available during the outage. The registration processes are: Requesting access to the IESO systems Managing your organization's contact information Managing your information Managing your organization's information (Emergency preparedness plans, Licences, Banking information and general information) Requesting authorization to an IESO administered market or program Cancelling a request for authorization
February 16, 2017
13:30 - 14:00	IESO Portal	Loss of access to the IESO Portal will impact the following applications: Transmission Rights Auction (TRA) application will be unavailable All on-line collaboration communities will be unavailable Settlements Online Forms cannot be submitted or retrieved Prudential Manager used to monitor and retrieve prudential information will be unavailable EMI application used to submit bids, offers, schedules and forecasts will be unavailable. Market participants should confirm their bids and offers once the outage is completed. IESO Online, used for various registration processes will not be available during the outage. The registration processes are: Requesting access to the IESO systems Managing your organization's contact information Managing your information Managing your organization's information (Emergency preparedness plans, Licences, Banking information and general information) Requesting authorization to an IESO administered market or program Cancelling a request for authorization
February 22, 2017
13:15 - 13:45	Message Exchange	Loss of access to Message Exchange will result in the following applications being impacted: Automated dispatch instructions will be unavailable. The IESO will manually dispatch by phone as necessary. Administrative pricing will be used. Pre-dispatch and dispatch schedules and prices may not be updated.
13:15 - 17:30	Day-Ahead Optimization System (DAOS)	The Eligible Energy Limited Resource Optimization (EELR) run of the Day-Ahead Commitment Process (DACP) DAOS will not occur: EELRs will be unable to resubmit their offers for consideration in the DACP after the initial DAOS run If the initial DAOS run is successful, it will be considered the Schedule of Record
February 28, 2017
10:35 - 10:55	Report Site	Confidential Report publication will be delayed. Public Report publication will be delayed.
13:20 - 13:30	Message Exchange	Loss of access to Message Exchange will result in the following applications being impacted: Automated dispatch instructions will be unavailable. The IESO will manually dispatch by phone as necessary. Administrative pricing will be used. Pre-dispatch and dispatch schedules and prices may not be updated.
January 4, 2017
13:30 - 13:35	EMI	EMI application used to submit bids, offers, schedules and forecast will be unavailable.
13:30 - 13:35	MIM API	MIM Web services used to submit bids, offers, schedules and forecast will be unavailable. MIM IDK used to submit bids, offers, schedules and forecast will be unavailable.
January 23, 2017
14:20 - 14:50	Message Exchange	Loss of access to Message Exchange will result in the following applications being impacted: Automated dispatch instructions will be unavailable. The IESO will manually dispatch by phone as necessary. Administrative pricing will be used. Pre-dispatch and dispatch schedules and prices may not be updated.
January 24, 2017
14:20 - 14:55	Message Exchange	Loss of access to Message Exchange will result in the following applications being impacted: Automated dispatch instructions will be unavailable. The IESO will manually dispatch by phone as necessary. Administrative pricing will be used. Pre-dispatch and dispatch schedules and prices may not be updated.
January 25, 2017
13:15 - 17:30	Day-Ahead Optimization System (DAOS)	The Eligible Energy Limited Resource Optimization (EELR) run of the Day-Ahead Commitment Process (DACP) DAOS will not occur: EELRs will be unable to resubmit their offers for consideration in the DACP after the initial DAOS run If the initial DAOS run is successful, it will be considered the Schedule of Record
13:15 - 13:45	Message Exchange	Loss of access to Message Exchange will result in the following applications being impacted: Automated dispatch instructions will be unavailable. The IESO will manually dispatch by phone as necessary. Administrative pricing will be used. Pre-dispatch and dispatch schedules and prices may not be updated.
January 31, 2017
13:15 - 13:45	Message Exchange	Loss of access to Message Exchange will result in the following applications being impacted: Automated dispatch instructions will be unavailable. The IESO will manually dispatch by phone as necessary. Administrative pricing will be used. Pre-dispatch and dispatch schedules and prices may not be updated.
13:15 - 17:30	Day-Ahead Optimization System (DAOS)	The Eligible Energy Limited Resource Optimization (EELR) run of the Day-Ahead Commitment Process (DACP) DAOS will not occur: EELRs will be unable to resubmit their offers for consideration in the DACP after the initial DAOS run If the initial DAOS run is successful, it will be considered the Schedule of Record

Planned IT Outages

Planned Outages for 24/06/2017

Future Outages

Past Outages