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 21 Apr 2018

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

Future Outages

Sort your results by:
Outage Date
System
Archive

Outage Times	System(s)	Description
April 24, 2018
11:30 - 11:45 EST	Sandbox Portal	IESO Sandbox Portal and testing for the the following applications will be unavailable: Transmission Rights Auction (TRA ) application Settlements Online Forms Metering (MVWeb) Prudential Manager
15:15 - 15:40 EST	IESO Reports Site	Public Report publication will be delayed.Confidential Report publication will be delayed.
April 25, 2018
12:15 - 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
12:30 - 13:30 EST	Dispatch Service	Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary.
12:30 - 13:30 EST	EMI	EMI application used to submit bids, offers, schedules and forecast will be unavailable.EMI API application used to submit bids, offers, schedules and forecast will be unavailable.
12:30 - 13:30 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.
12:30 - 13:30 EST	Outage Coordination and Scheduling System (OCSS) - CROW Web Interface	OCSS Web User Interface will be unavailable for outage submission and retrieval. OCSS Web Service will be unavailable for outage submission and retrieval.
12:30 - 13:30 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 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
12:30 - 13:30 EST	Report Site	The 13:07 Predispatch report will not be published.
12:30 - 13:30 EST	Report Site	Confidential Report publication will be delayed. Public Report publication will be delayed.
April 26, 2018
11:20 - 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
10:50 - 12:00 EST	EMI	EMI application used to submit bids, offers, schedules and forecast will be unavailable.EMI API application used to submit bids, offers, schedules and forecast will be unavailable.
April 30, 2018
15:35 - 16:15	Outage Coordination and Scheduling System (OCSS) - CROW Web Interface	OCSS Web User Interface will be unavailable for outage submission and retrieval. OCSS Web Service will be unavailable for outage submission and retrieval.
15:40 - 15:55 EST	Report Site	Confidential Report publication will be delayed. Public Report publication will be delayed.
May 1, 2018
13:15 - 13:45 EST	Dispatch Service	Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary.
13:15 - 13:45 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.

Outage Times	Date	Description
Sandbox Portal
11:30 - 11:45 EST	April 24, 2018	IESO Sandbox Portal and testing for the the following applications will be unavailable: Transmission Rights Auction (TRA ) application Settlements Online Forms Metering (MVWeb) Prudential Manager
IESO Reports Site
15:15 - 15:40 EST	April 24, 2018	Public Report publication will be delayed.Confidential Report publication will be delayed.
Day-Ahead Optimization System (DAOS)
12:15 - 16:00 EST	April 25, 2018	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
11:20 - 16:00 EST	April 26, 2018	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
Dispatch Service
12:30 - 13:30 EST	April 25, 2018	Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary.
13:15 - 13:45 EST	May 1, 2018	Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary.
EMI
12:30 - 13:30 EST	April 25, 2018	EMI application used to submit bids, offers, schedules and forecast will be unavailable.EMI API application used to submit bids, offers, schedules and forecast will be unavailable.
10:50 - 12:00 EST	April 26, 2018	EMI application used to submit bids, offers, schedules and forecast will be unavailable.EMI API application used to submit bids, offers, schedules and forecast will be unavailable.
Message Exchange
12:30 - 13:30 EST	April 25, 2018	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.
13:15 - 13:45 EST	May 1, 2018	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.
Outage Coordination and Scheduling System (OCSS) - CROW Web Interface
12:30 - 13:30 EST	April 25, 2018	OCSS Web User Interface will be unavailable for outage submission and retrieval. OCSS Web Service will be unavailable for outage submission and retrieval.
15:35 - 16:15	April 30, 2018	OCSS Web User Interface will be unavailable for outage submission and retrieval. OCSS Web Service will be unavailable for outage submission and retrieval.
IESO Portal
12:30 - 13:30 EST	April 25, 2018	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
Report Site
12:30 - 13:30 EST	April 25, 2018	The 13:07 Predispatch report will not be published.
12:30 - 13:30 EST	April 25, 2018	Confidential Report publication will be delayed. Public Report publication will be delayed.
15:40 - 15:55 EST	April 30, 2018	Confidential Report publication will be delayed. Public Report publication will be delayed.

Outage Times	System(s)	Description
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	EMI 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.
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.
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.
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.
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 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.
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.
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.
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.
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.
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.
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.
April 5, 2017
09:00 - 09:20 EST	Sandbox Portal	IESO Sandbox Portal and testing for the the following applications will be unavailable: Transmission Rights Auction (TRA ) application Settlements Online Forms Metering (MVWeb) 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 OCSS. OCSS 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.
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	EMI API	EMI application used to submit bids, offers, schedules and forecast will be unavailable.EMI 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	EMI 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.EMI 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.
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.
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.
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.
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.
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 OCSS. OCSS Web User Interface will be unavailable for outage submission and retrieval. OCSS Web Service will be unavailable for outage submission and retrieval.
July 10, 2017
08:00 - 09:30 EST	Sandbox MIM	Sandbox MIM Web Services and Sandbox MIM IDK used to submit Sandbox bids, offers schedules and forecasts will be unavailable.
July 17, 2017
13:30 - 13:40 EST	Sandbox MIM	Sandbox MIM Web Services and Sandbox MIM IDK used to submit Sandbox bids, offers schedules and forecasts will be unavailable.
July 12, 2017
12:20 - 12:30 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.
July 28, 2017
11:15 - 11:20 EST	IESO Portal	Settlements Online Forms cannot be submitted or retrieved
July 24, 2017
11:00 - 11:30 EST	Sandbox Outage Coordination and Scheduling System (OCSS) - CROW Web Interface	OCSS Web User Interface will be unavailable for outage submission and retrieval.OCSS Web Service will be unavailable for outage submission and retrieval.
July 14, 2017
08:20 - 10:30 EST	Sandbox MIM	Sandbox MIM Web Services and Sandbox MIM IDK used to submit Sandbox bids, offers schedules and forecasts will be unavailable.
August 24, 2017
09:10 - 10:05	EMI API	EMI application used to submit bids, offers, schedules and forecast will be unavailable.EMI 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.
August 17, 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.
13:00 - 13:07 EST	Report Site	The 13:07 Predispatch report will not be published.
August 9, 2017
10:50 - 11:20 EST	Sandbox MIM	Sandbox MIM Web Services and Sandbox MIM IDK used to submit Sandbox bids, offers schedules and forecasts will be unavailable.
August 29, 2017
09:11 - 09:13 EST	EMI 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.
09:26 - 09:28 EST	EMI 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.
September 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.
September 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 OCSS. OCSS Web User Interface will be unavailable for outage submission and retrieval. OCSS Web Service will be unavailable for outage submission and retrieval.
September 6, 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.
October 5, 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.
September 12, 2017
09:20 - 09:30 EST	EMI 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.
September 27, 2017
15:30 - 22:25 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
15:30 - 22:25 EST	IESO Portal	Prudential Manager used to monitor and retrieve prudential information will be unavailable
September 28, 2017
11:00 - 12:30 EST	Outage Coordination and Scheduling System (OCSS) - CROW Web Interface	OCSS Web User Interface will be unavailable for outage submission and retrieval. OCSS Web Service will be unavailable for outage submission and retrieval.
September 19, 2017
15:20 - 16:10 EST	IESO Website	Market data will not be updated.
12:15 - 13:15 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
07:50 - 08:50 EST	EMI	EMI application used to submit bids, offers, schedules and forecast will be unavailable.
07:50 - 08:50 EST	EMI 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.
12:15 - 13:10 EST	Message Exchange
14:20 - 14:40 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.
15:20 - 16:00 EST	Outage Coordination and Scheduling System (OCSS) - CROW Web Interface	OCSS Web User Interface will be unavailable for outage submission and retrieval.
15:20 - 16:00 EST	Outage Coordination and Scheduling System (OCSS) - Web Service (API)	OCSS Web Service will be unavailable for outage submission and retrieval.
12:15 - 13:15 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 - 13:10 EST	IESO Portal	Transmission Rights Auction (TRA) will be unavailableAll on-line collaboration communities will be unavailableSettlements Online Forms cannot be submitted or retrievedPrudential Manager used to monitor and retrieve prudential information will be unavailableMeter data cannot be retrieved.
13:00 - 13:10 EST	IESO Reports Site	The 13:07 Predispatch report will not be published.
15:10 - 15:50 EST	IESO Portal	Prudential Manager used to monitor and retrieve prudential information will be unavailableSettlements Online Forms cannot be submitted or retrieved
12:15 - 13:15 EST	Outage Coordination and Scheduling System (OCSS) - CROW Web Interface	Hydro One and Ontario Power Generation cannot submit or retrieve outages through OCSS. OCSS Web User Interface will be unavailable for outage submission and retrieval. OCSS Web Service will be unavailable for outage submission and retrieval.
September 18, 2017
15:00 - 15:30 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
September 21, 2017
12:15 - 13:15 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
15:20 - 16:10 EST	IESO Website	Market data will not be updated.
12:15 - 13:10 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.
14:20 - 14:40 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.
15:20 - 16:00 EST	Outage Coordination and Scheduling System (OCSS) - CROW Web Interface	OCSS Web User Interface will be unavailable for outage submission and retrieval.
15:20 - 16:00 EST	Outage Coordination and Scheduling System (OCSS) - Web Service (API)	OCSS Web Service will be unavailable for outage submission and retrieval.
12:15 - 13:15 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 - 13:10 EST	IESO Portal	Transmission Rights Auction (TRA) will be unavailableAll on-line collaboration communities will be unavailableSettlements Online Forms cannot be submitted or retrievedPrudential Manager used to monitor and retrieve prudential information will be unavailableMeter data cannot be retrieved.
13:00 - 13:10 EST	IESO Reports Site	The 13:07 Predispatch report will not be published.
15:10 - 15:50 EST	IESO Portal	Prudential Manager used to monitor and retrieve prudential information will be unavailableSettlements Online Forms cannot be submitted or retrieved
12:16 - 13:15 EST	Outage Coordination and Scheduling System (OCSS) - CROW Web Interface	Hydro One and Ontario Power Generation cannot submit or retrieve outages through OCSS. OCSS Web User Interface will be unavailable for outage submission and retrieval. OCSS Web Service will be unavailable for outage submission and retrieval.
September 22, 2017
15:00 - 15:30 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
October 4, 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.
October 3, 2017
08:15 - 13:45 EST	Sandbox System and Applications	Sandbox systems used for participant testing of IESO applications, including the IESO Sandbox Portal, Sandbox Reports Site and Sandbox EMI, will be unavailable.
October 26, 2017
08:00 - 16:00 EST	IESO Sandbox Reports Site	Testing on the Sandbox Report site will be unavailable
October 23, 2017
08:00 - 14:00 EST	Sandbox System and Applications	Sandbox systems used for participant testing of IESO applications, including the IESO Sandbox Portal, Sandbox Reports Site and Sandbox EMI, will be unavailable.
October 25, 2017
09:20 - 09:30 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 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
13:20 - 13:30 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 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
October 27, 2017
10:20 - 10:30 EST	EMI	EMI application used to submit bids, offers, schedules and forecast will be unavailable.EMI API application used to submit bids, offers, schedules and forecast will be unavailable.
12:20 - 12:30 EST	EMI	EMI application used to submit bids, offers, schedules and forecast will be unavailable.EMI API application used to submit bids, offers, schedules and forecast will be unavailable.
October 24, 2017
10:30 - 10:50 EST	Report Site	Confidential Report publication will be delayed. Public Report publication will be delayed.
October 30, 2017
12:20 - 13:00 EST	Sandbox System and Applications	Sandbox systems used for participant testing of IESO applications, including the IESO Sandbox Portal, Sandbox Reports Site and Sandbox EMI, will be unavailable.
October 31, 2017
08:20 - 14:00 EST	Sandbox System and Applications	Sandbox systems used for participant testing of IESO applications, including the IESO Sandbox Portal, Sandbox Reports Site and Sandbox EMI, will be unavailable.
November 1, 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.
12:20 - 14:00 EST	Sandbox System and Applications	Sandbox systems used for participant testing of IESO applications, including the IESO Sandbox Portal, Sandbox Reports Site and Sandbox EMI, will be unavailable.
09:20 - 10:00 EST	IESO Sandbox Reports Site	Testing on the Sandbox Report site will be unavailable
November 2, 2017
08:20 - 10:30 EST	Sandbox System and Applications	Sandbox systems used for participant testing of IESO applications, including the IESO Sandbox Portal, Sandbox Reports Site and Sandbox EMI, will be unavailable.
November 8, 2017
13:30 - 16:30 EST	Sandbox Dispatch Service	Sandbox automated dispatch instructions sent via sandbox Dispatch Service will be unavailable.
09:00 - 10:00 EST	IESO Sandbox Reports Site	Testing on the Sandbox Report site will be unavailable
November 9, 2017
12:20 - 17:00 EST	Sandbox Dispatch Service	Sandbox automated dispatch instructions sent via sandbox Dispatch Service will be unavailable.
November 30, 2017
10:20 - 10:30 EST	EMI	EMI application used to submit bids, offers, schedules and forecast will be unavailable.EMI API application used to submit bids, offers, schedules and forecast will be unavailable.
10:40 - 10:50 EST	EMI	EMI application used to submit bids, offers, schedules and forecast will be unavailable.EMI API application used to submit bids, offers, schedules and forecast will be unavailable.
09:40 - 09:45 EST	IESO Portal	Settlements Online Forms cannot be submitted or retrieved
November 22, 2017
09:00 - 11:00 EST	Sandbox Dispatch Service	Sandbox automated dispatch instructions sent via sandbox Dispatch Service will be unavailable.
December 13, 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.
December 12, 2017
12:30 - 13:30 EST	Outage Coordination and Scheduling System (OCSS) - CROW Web Interface	OCSS Web User Interface will be unavailable for outage submission and retrieval. OCSS Web Service will be unavailable for outage submission and retrieval.
10:30 - 11:00 EST	IESO Reports Site	Public Report publication will be delayed.Confidential Report publication will be delayed.
December 6, 2017
13:00 - 13:07 EST	Report Site	The 13:07 Predispatch report will not be published.
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 - 12:30 EST	EMI	EMI application used to submit bids, offers, schedules and forecast will be unavailable.EMI API application used to submit bids, offers, schedules and forecast will be unavailable.
12:20 - 13:45 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.
January 4, 2018
10:00 - 10:30 EST	Sandbox MIM	Sandbox MIM Web Services and Sandbox MIM IDK used to submit Sandbox bids, offers schedules and forecasts will be unavailable.
January 9, 2018
09:00 - 13:00 EST	Sandbox Dispatch Service	Sandbox automated dispatch instructions sent via sandbox Dispatch Service will be unavailable.
January 14, 2018
10:20 - 12:20 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.
10:20 - 12:20 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
10:20 - 12:20 EST	Outage Coordination and Scheduling System (OCSS) - CROW Web Interface	OCSS Web User Interface will be unavailable for outage submission and retrieval. OCSS Web Service will be unavailable for outage submission and retrieval.Hydro One and Ontario Power Generation cannot submit or retrieve outages through OCSS.
10:20 - 12:20 EST	Report Site	Public Report publication will be delayed.Confidential Report publication will be delayed.
January 16, 2018
13:33 - 13:41 EST	EMI	EMI application used to submit bids, offers, schedules and forecast will be unavailable.EMI API application used to submit bids, offers, schedules and forecast will be unavailable.
10:25 - 10:45 EST	EMI	EMI application used to submit bids, offers, schedules and forecast will be unavailable.EMI API application used to submit bids, offers, schedules and forecast will be unavailable.
January 17, 2018
13:15 - 17:30 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
13:15 - 13:45 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.
10:20 - 10:30 EST	EMI	EMI application used to submit bids, offers, schedules and forecast will be unavailable.EMI API application used to submit bids, offers, schedules and forecast will be unavailable.
February 27, 2018
09:15 - 09:17 EST	EMI	EMI application used to submit bids, offers, schedules and forecast will be unavailable.EMI API application used to submit bids, offers, schedules and forecast will be unavailable.
09:37 - 09:39 EST	EMI	EMI application used to submit bids, offers, schedules and forecast will be unavailable.EMI API application used to submit bids, offers, schedules and forecast will be unavailable.
10:41 - 11:00 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.
11:29 - 11:49 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.
February 1, 2018
13:20 - 13:35 EST	EMI	EMI application used to submit bids, offers, schedules and forecast will be unavailable.EMI API application used to submit bids, offers, schedules and forecast will be unavailable.
15:20 - 15:35 EST	EMI	EMI application used to submit bids, offers, schedules and forecast will be unavailable.EMI API application used to submit bids, offers, schedules and forecast will be unavailable.
February 8, 2018
11:45 - 12:00 EST	Outage Coordination and Scheduling System (OCSS) - CROW Web Interface	OCSS Web User Interface will be unavailable for outage submission and retrieval. OCSS Web Service will be unavailable for outage submission and retrieval.
13:45 - 14:00 EST	Outage Coordination and Scheduling System (OCSS) - CROW Web Interface	OCSS Web User Interface will be unavailable for outage submission and retrieval. OCSS Web Service will be unavailable for outage submission and retrieval.
February 14, 2018
10:00 - 11:00 EST.	Sandbox Outage Coordination and Scheduling System (OCSS) - CROW Web Interface	Hydro One and Ontario Power Generation cannot submit or retrieve outages through OCSS. OCSS Web User Interface will be unavailable for outage submission and retrieval. OCSS Web Service will be unavailable for outage submission and retrieval.
February 20, 2018
10:00 - 11:00 EST	Sandbox Dispatch Service	Sandbox automated dispatch instructions sent via sandbox Dispatch Service will be unavailable.
February 21, 2018
13:15 - 17:30 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
13:15 - 13:45 EST	Dispatch Service	Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary.
13:15 - 13:45 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.
February 22, 2018
12:30 - 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
12:30 - 13:30 EST	Dispatch Service	Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary.
12:30 - 13:30 EST	EMI	EMI application used to submit bids, offers, schedules and forecast will be unavailable.EMI API application used to submit bids, offers, schedules and forecast will be unavailable.
12:30 - 13:30 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.
12:30 - 13:30 EST	Outage Coordination and Scheduling System (OCSS) - CROW Web Interface	OCSS Web User Interface will be unavailable for outage submission and retrieval. OCSS Web Service will be unavailable for outage submission and retrieval.
12:30 - 13:30 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 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
13:00 - 13:10 EST	IESO Reports Site	The 13:07 Predispatch report will not be published.
12:30 - 13:30 EST	Report Site	Confidential Report publication will be delayed. Public Report publication will be delayed.
February 23, 2018
12:30 - 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
12:30 - 13:30 EST	Dispatch Service	Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary.
12:30 - 13:30 EST	EMI	EMI application used to submit bids, offers, schedules and forecast will be unavailable.EMI API application used to submit bids, offers, schedules and forecast will be unavailable.
12:30 - 13:30 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.
12:30 - 13:30 EST	Outage Coordination and Scheduling System (OCSS) - CROW Web Interface	OCSS Web User Interface will be unavailable for outage submission and retrieval. OCSS Web Service will be unavailable for outage submission and retrieval.
12:30 - 13:30 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 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
13:00 - 13:10 EST	IESO Reports Site	The 13:07 Predispatch report will not be published.
12:30 - 13:30 EST	Report Site	Confidential Report publication will be delayed. Public Report publication will be delayed.
March 12, 2018
13:00 - 14:00 EST	Sandbox System and Applications
March 21, 2018
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
March 22, 2018
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:!5 - 12:45 EST	Dispatch Service	Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary.
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.
March 28, 2018
13:20 - 14:10 EST	Dispatch Service	Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary.
13:20 - 14:10 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.
08:15 - 10:20 EST	Sandbox System and Applications	Sandbox systems used for participant testing of IESO applications, including the IESO Sandbox Portal, Sandbox Reports Site and Sandbox EMI, will be unavailable.
March 27, 2018
10:30 - 11:15 EST	Sandbox MIM	Sandbox MIM Web Services and Sandbox MIM IDK used to submit Sandbox bids, offers schedules and forecasts will be unavailable.
13:10 - 13:45 EST	Sandbox MIM	Sandbox MIM Web Services and Sandbox MIM IDK used to submit Sandbox bids, offers schedules and forecasts will be unavailable.
April 18, 2018
13:00 - 13:10 EST	Report Site	The 13:07 Predispatch report will not be published.
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	Dispatch Service	Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary.
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.
April 12, 2018
07:00 - 07:25 EST	Outage Coordination and Scheduling System (OCSS) - CROW Web Interface	OCSS Web User Interface will be unavailable for outage submission and retrieval. OCSS Web Service will be unavailable for outage submission and retrieval.
08:20 - 08:45 EST	Outage Coordination and Scheduling System (OCSS) - CROW Web Interface	OCSS Web User Interface will be unavailable for outage submission and retrieval. OCSS Web Service will be unavailable for outage submission and retrieval.
07:00 - 07:25 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)
08:20 - 08:45 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)
April 16, 2018
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
April 17, 2018
11:10 - 11:20 EST	Outage Coordination and Scheduling System (OCSS) - CROW Web Interface	OCSS Web User Interface will be unavailable for outage submission and retrieval. OCSS Web Service will be unavailable for outage submission and retrieval.
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
12:30 - 12:56 EST	Dispatch Service	Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary.
13:34 - 13:54 EST	Dispatch Service	Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary.
12:30 - 12:56 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.
13:34 - 13:54 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.
08:40 - 08:50 EST	IESO Reports Site	Public Report publication will be delayed.Confidential Report publication will be delayed.
April 19, 2018
09:20 - 09:30 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 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
13:20 - 13:30 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 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
April 20, 2018
11:25 - 11: 50 EST	Outage Coordination and Scheduling System (OCSS) - CROW Web Interface	OCSS Web User Interface will be unavailable for outage submission and retrieval. OCSS Web Service will be unavailable for outage submission and retrieval.
09:20 - 09:30 EST	EMI	EMI application used to submit bids, offers, schedules and forecast will be unavailable.EMI API application used to submit bids, offers, schedules and forecast will be unavailable.
10:20 - 10:30 EST	EMI	EMI application used to submit bids, offers, schedules and forecast will be unavailable.EMI API application used to submit bids, offers, schedules and forecast will be unavailable.
11:25 - 11:50 EST	Dispatch Service	Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary.
April 13, 2018
09:30 - 10:30 EST	Sandbox Outage Coordination and Scheduling System (OCSS) - CROW Web Interface	OCSS Web User Interface will be unavailable for outage submission and retrieval.OCSS Web Service will be unavailable for outage submission and retrieval.

Planned IT Outages

Planned Outages for 21 Apr 2018

Future Outages

Past Outages