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 12 Aug 2020

Outage Times	Systems	Description
There are no scheduled outages.

Future Outages

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Outage Date
System
Archive

Outage Times	Systems	Description
August 26, 2020
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. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage.
12:15 - 12:45 EST	Report Site	Confidential Report publication will be delayed. Public Report publication will be delayed.
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
13:00 - 13:10 EST	IESO Reports Site	The Predispatch report will not be published.
August 16, 2020
19:00 - 21:00 EST	Online IESO

Outage Times	Date	Description
Dispatch Service
12:15 - 12:45 EST	August 26, 2020	Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage.
Report Site
12:15 - 12:45 EST	August 26, 2020	Confidential Report publication will be delayed. Public Report publication will be delayed.
Day-Ahead Optimization System (DAOS)
12:15 - 16:30 EST	August 26, 2020	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
IESO Reports Site
13:00 - 13:10 EST	August 26, 2020	The Predispatch report will not be published.
Online IESO
19:00 - 21:00 EST	August 16, 2020

Outage Times	Systems	Description
October 2, 2019
08:00 - 13:45 EST	Sandbox System and Applications	Sandbox systems used for participant testing of IESO applications, including the IESO Sandbox Portal, Sandbox Reports Site, Sandbox EMI, and Sandbox Online IESO, will be unavailable.
October 17, 2019
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. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage.
13:00 - 13:10 EST	IESO Reports Site	The Predispatch report will not be published.
October 15, 2019
12:20 - 12:25 EST	Dispatch Service	Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage.
13:20 - 13:25 EST	Dispatch Service	Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage.
14:20 - 14:25 EST	Dispatch Service	Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage.
12:20 - 12:25 EST	Online IESO	Due to planned outage Online IESO will not be available. This includes the following actions: Registration Automation System – Manage organization registration and participant authorization, Facility registration and Meter Installation processes. Notice of Disagreement (NOD) – Manage the process with participants related to settlement and invoicing concerns. Meter Trouble Report (MTR) - Manages the process related to correcting revenue meter errors. Meter Data Management (MDM) – Manage meter data report profiles and submit ad-hoc meter data requests. Prudential System - Submit Prudential Support Information. Demand Response Auction – Submit Capacity Qualification and Demand Response Auction Offer. Reliability Compliance Tool - Manage the process of collecting submittals from participants related to NERC reliability standards. Enable Capacity Export – Give the market participant the ability to sell excess capacity to neighboring jurisdictions. Online Settlement Forms - Collect market participant data required to settle the market. CDM Plan and Measures - Used by LDCs and IESO to collaborate on changes to the LDC CDM Plans. Retrofit - Manage Conservation Retrofit program and Restful API to interact with Retrofit program. Beacon System - Manage the process with external suppliers related to FIT and microFIT contract management.
13:20 - 13:25 EST	Online IESO	Due to planned outage Online IESO will not be available. This includes the following actions: Registration Automation System – Manage organization registration and participant authorization, Facility registration and Meter Installation processes. Notice of Disagreement (NOD) – Manage the process with participants related to settlement and invoicing concerns. Meter Trouble Report (MTR) - Manages the process related to correcting revenue meter errors. Meter Data Management (MDM) – Manage meter data report profiles and submit ad-hoc meter data requests. Prudential System - Submit Prudential Support Information. Demand Response Auction – Submit Capacity Qualification and Demand Response Auction Offer. Reliability Compliance Tool - Manage the process of collecting submittals from participants related to NERC reliability standards. Enable Capacity Export – Give the market participant the ability to sell excess capacity to neighboring jurisdictions. Online Settlement Forms - Collect market participant data required to settle the market. CDM Plan and Measures - Used by LDCs and IESO to collaborate on changes to the LDC CDM Plans. Retrofit - Manage Conservation Retrofit program and Restful API to interact with Retrofit program. Beacon System - Manage the process with external suppliers related to FIT and microFIT contract management.
14:20 - 14:25 EST	Online IESO	Due to planned outage Online IESO will not be available. This includes the following actions: Registration Automation System – Manage organization registration and participant authorization, Facility registration and Meter Installation processes. Notice of Disagreement (NOD) – Manage the process with participants related to settlement and invoicing concerns. Meter Trouble Report (MTR) - Manages the process related to correcting revenue meter errors. Meter Data Management (MDM) – Manage meter data report profiles and submit ad-hoc meter data requests. Prudential System - Submit Prudential Support Information. Demand Response Auction – Submit Capacity Qualification and Demand Response Auction Offer. Reliability Compliance Tool - Manage the process of collecting submittals from participants related to NERC reliability standards. Enable Capacity Export – Give the market participant the ability to sell excess capacity to neighboring jurisdictions. Online Settlement Forms - Collect market participant data required to settle the market. CDM Plan and Measures - Used by LDCs and IESO to collaborate on changes to the LDC CDM Plans. Retrofit - Manage Conservation Retrofit program and Restful API to interact with Retrofit program. Beacon System - Manage the process with external suppliers related to FIT and microFIT contract management.
12:20 - 12:25 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 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.
13:20 - 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 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.
14:20 - 14:25 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 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.
October 18, 2019
10:20 - 10:30 EST	Dispatch Service	Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage.
13:20 - 13:30 EST	Dispatch Service	Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage.
October 21, 2019
09:20 - 09:30 EST	IESO Reports Site	The Predispatch report will not be published.
October 22, 2019
12:10 - 12:15 EST	Outage Coordination and Scheduling System (OCSS) - CROW Web Interface	OCSS Web Service will be unavailable for outage submission and retrieval.OCSS Web User Interface will be unavailable for outage submission and retrieval.
11:55 - 14:20	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
October 23, 2019
12:40 - 12:50 EST	IESO Portal	Report site will be unavailable and publication of public and confidential Reports will be delayed.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 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. Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage.
12:20 - 12:25	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
09:40 - 09:55 EST	IESO Portal	Report site will be unavailable and publication of public and confidential Reports will be delayed.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 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. Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage.
October 24, 2019
11:20 - 13:20	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 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. 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.OCSS Web User Interface will be unavailable for outage submission and retrieval. Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage.Report site will be unavailable and publication of public and confidential Reports will be delayed.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 New person registration in the Registration Application will not be available.
October 25, 2019
09:20 - 09:40 EST	EMI	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.
12:20 - 12:40 EST	EMI	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.
11:20 - 12:23	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 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. 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.OCSS Web User Interface will be unavailable for outage submission and retrieval. Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage.Report site will be unavailable and publication of public and confidential Reports will be delayed.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 New person registration in the Registration Application will not be available.
October 28, 2019
11:20 - 12:23	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 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. 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.OCSS Web User Interface will be unavailable for outage submission and retrieval. Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage.Report site will be unavailable and publication of public and confidential Reports will be delayed.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 New person registration in the Registration Application will not be available.
October 29, 2019
13:25 - 13:30 EST	Dispatch Service	Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage.
14:51 - 14:56 EST	Dispatch Service	Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage.
November 5, 2019
02:25 - 02:35 EST	Dispatch Service	Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage.
05:25 - 05:35 EST	Dispatch Service	Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage.
02:25 - 02:35 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.
05:25 - 05:35 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.
13:20 - 14:20 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 EST	Dispatch Service	Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage.
13:20 - 14:20 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.
13:20 - 14:20 EST	Outage Coordination and Scheduling System (OCSS) - CROW Web Interface	OCSS Web User Interface will be unavailable for outage submission and retrieval.
13:20 - 14:20 EST	Online IESO	New person registration in the Registration Application will not be available.
13:20 - 14:20 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 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.
14:00 - 14:10 EST	Report Site	The Predispatch report will not be published.
November 6, 2019
09:00 - 11:30 EST	Sandbox System and Applications	Sandbox systems used for participant testing of the IESO EMI application will be unavailable.
November 13, 2019
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. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage.
14:00 - 14:10 EST	IESO Reports Site	The Predispatch report will not be published.
November 19, 2019
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. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage.
14:00 - 14:10 EST	IESO Reports Site	The Predispatch report will not be published.
November 26, 2019
13:20 - 13:35 EST	Dispatch Service	Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage.
14:40 - 14:55 EST	Dispatch Service	Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage.
November 20, 2019
10:25 - 10:40 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.
11:18 - 11:37 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.
17:00 - 19:00 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
November 21, 2019
09:00 - 11:30 EST	Sandbox System and Applications	Sandbox systems used for participant testing of the IESO EMI application will be unavailable.
November 1, 2019
12:20 - 13:30 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 - 13:30 EST	Dispatch Service	Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage.
12:20 - 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.
12:20 - 13:30 EST	Outage Coordination and Scheduling System (OCSS) - CROW Web Interface	OCSS Web User Interface will be unavailable for outage submission and retrieval.
12:20 - 13:30 EST	Online IESO	New person registration in the Registration Application will not be available.
12:20 - 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 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.
13:00 - 13:10 EST	Report Site	The Predispatch report will not be published.
December 10, 2019
12:15 - 12:25 EST	Dispatch Service	Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage.
15:15 - 15:25 EST	Dispatch Service	Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage.
12:15 - 12:25 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.
15:15 - 15:25 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.
December 11, 2019
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. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage.
14:00 - 14:10 EST	IESO Reports Site	The Predispatch report will not be published.
December 9, 2019
10:30 - 10:40 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.
December 12, 2019
10:45 - 10:50 EST	Dispatch Service	Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage.
December 17, 2019
11:15 - 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.
10:15 - 10:20 EST	Dispatch Service	Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage.
10:45 - 10:50 EST	Dispatch Service	Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage.
December 19, 2019
15:30 - 16:00 EST	IESO Reports Site	Public Report publication will be delayed.Confidential Report publication will be delayed.
December 16, 2019
12:40 - 12:50 EST	Online IESO	Due to planned outage Online IESO will not be available. This includes the following actions: Registration Automation System – Manage organization registration and participant authorization, Facility registration and Meter Installation processes. Notice of Disagreement (NOD) – Manage the process with participants related to settlement and invoicing concerns. Meter Trouble Report (MTR) - Manages the process related to correcting revenue meter errors. Meter Data Management (MDM) – Manage meter data report profiles and submit ad-hoc meter data requests. Prudential System - Submit Prudential Support Information. Demand Response Auction – Submit Capacity Qualification and Demand Response Auction Offer. Reliability Compliance Tool - Manage the process of collecting submittals from participants related to NERC reliability standards. Enable Capacity Export – Give the market participant the ability to sell excess capacity to neighboring jurisdictions. Online Settlement Forms - Collect market participant data required to settle the market. CDM Plan and Measures - Used by LDCs and IESO to collaborate on changes to the LDC CDM Plans. Retrofit - Manage Conservation Retrofit program and Restful API to interact with Retrofit program. Beacon System - Manage the process with external suppliers related to FIT and microFIT contract management.
June 1, 2020
11:00 - 12:15 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.
11:00 - 12:15 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.
09:30 - 09:45 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 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.
09:30 - 09:45 EST	IESO Reports Site	Report site will be unavailable and publication of public and confidential Reports will be delayed.
09:30 - 09:45 EST	Dispatch Service	Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage.
07:00 - 07:15 EST	Sandbox Dispatch Service	Sandbox automated dispatch instructions sent via sandbox Dispatch Service will be unavailable.
07:00 - 07:15 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
June 14, 2020
19:00 - 21:00 EST	Online IESO	Due to planned outage Online IESO will not be available. This includes the following actions: Registration Automation System – Manage organization registration and participant authorization, Facility registration and Meter Installation processes. Notice of Disagreement (NOD) – Manage the process with participants related to settlement and invoicing concerns. Meter Trouble Report (MTR) - Manages the process related to correcting revenue meter errors. Meter Data Management (MDM) – Manage meter data report profiles and submit ad-hoc meter data requests. Prudential System - Submit Prudential Support Information. Demand Response Auction – Submit Capacity Qualification and Demand Response Auction Offer. Reliability Compliance Tool - Manage the process of collecting submittals from participants related to NERC reliability standards. Enable Capacity Export – Give the market participant the ability to sell excess capacity to neighboring jurisdictions. Online Settlement Forms - Collect market participant data required to settle the market. CDM Plan and Measures - Used by LDCs and IESO to collaborate on changes to the LDC CDM Plans. Retrofit - Manage Conservation Retrofit program and Restful API to interact with Retrofit program. Beacon System - Manage the process with external suppliers related to FIT and microFIT contract management.
June 2, 2020
09:00 - 10:00 EST	Sandbox System and Applications	Sandbox systems used for participant testing of IESO applications, including the IESO Sandbox Portal, Sandbox Reports Site, Sandbox EMI, and Sandbox Online IESO, will be unavailable.
June 10, 2020
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 - 13:15 EST	Dispatch Service	Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage.
13:00 - 13:10 EST	IESO Reports Site	The Predispatch report will not be published.
June 9, 2020
08:00 - 16:00 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
June 15, 2020
13:10 - 13:20 EST	Dispatch Service	Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage.
June 11, 2020
07:30 - 07:45	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.
07:45 - 08:00 EST	Sandbox Online IESO	Due to planned outage Sandbox Online IESO will not be available. This includes the following actions: Registration Automation System – Manage organization registration and participant authorization, Facility registration and Meter Installation processes. Notice of Disagreement (NOD) – Manage the process with participants related to settlement and invoicing concerns. Meter Trouble Report (MTR) - Manages the process related to correcting revenue meter errors. Meter Data Management (MDM) – Manage meter data report profiles and submit ad-hoc meter data requests. Prudential System - Submit Prudential Support Information. Demand Response Auction – Submit Capacity Qualification and Demand Response Auction Offer. Reliability Compliance Tool - Manage the process of collecting submittals from participants related to NERC reliability standards. Enable Capacity Export – Give the market participant the ability to sell excess capacity to neighboring jurisdictions. Online Settlement Forms - Collect market participant data required to settle the market. CDM Plan and Measures - Used by LDCs and IESO to collaborate on changes to the LDC CDM Plans. Retrofit - Manage Conservation Retrofit program and Restful API to interact with Retrofit program.
1:20 - 1:25 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)
June 17, 2020
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 - 13:15 EST	Dispatch Service	Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage.
12:15 - 13:15 EST	IESO Reports Site	Confidential Report publication will be delayed. Public Report publication will be delayed.
13:00 - 13:10 EST	Report Site	The Predispatch report will not be published.
June 29, 2020
08:15 - 08:45 EST	Sandbox Dispatch Service	Sandbox automated dispatch instructions sent via sandbox Dispatch Service will be unavailable.
June 30, 2020
12:30 - 12:40 EST	Dispatch Service	Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage.
12:30 - 12:40 EST	Dispatch Service	Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage.
June 19, 2020
10:25 - 10:45 EST	Dispatch Service	Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage.
July 7, 2020
14:25 - 14:45 EST	Dispatch Service	Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage.
July 15, 2020
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 - 13:15 EST	Dispatch Service	Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage.
12:15 - 13:15 EST	IESO Reports Site	Confidential Report publication will be delayed. Public Report publication will be delayed.
13:00 - 13:10 EST	IESO Reports Site	The Predispatch report will not be published.
July 9, 2020
07:00 - 16:00 EST	Sandbox System and Applications	Sandbox systems used for participant testing of IESO applications, including the IESO Sandbox Portal, Sandbox Reports Site, Sandbox EMI, and Sandbox Online IESO, will be unavailable.
July 14, 2020
09:30 - 09:35 EST	IESO Website	Market data such as Demand, Supply and Price will not be updated on the Home Page or the Power Data Page. RSS feeds such as Advisory Notices and DACP notifications will not be updated in the Sector Participants section.
July 20, 2020
08:20 - 08:25 EST	Dispatch Service	Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage.
21:40 - 21:50 EST	IESO Portal	Prudential Manager used to monitor and retrieve prudential information will be unavailable
21:40 - 21:50 EST	IESO Reports Site	Confidential Report publication will be delayed. Public Report publication will be delayed.
July 21, 2020
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
21:30 - 21:50 EST	Dispatch Service	Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage.
00:15 - 00:35 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.
13:20 - 13:35 EST	Dispatch Service	Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage.
15:20 - 15:35 EST	Dispatch Service	Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage.
19:20 - 19:35 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 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.
15:20 - 15:35 EST	Dispatch Service	Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage.
July 22, 2020
03:40 - 03:45 EST	IESO Website	Market data such as Demand, Supply and Price will not be updated on the Home Page or the Power Data Page. RSS feeds such as Advisory Notices and DACP notifications will not be updated in the Sector Participants section.
04:20 - 04:25 EST	IESO Website	Market data such as Demand, Supply and Price will not be updated on the Home Page or the Power Data Page. RSS feeds such as Advisory Notices and DACP notifications will not be updated in the Sector Participants section.
00:27 - 00:32 EST	Dispatch Service	Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage.
10:20 - 10:28 EST	Dispatch Service	Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage.
10:47 - 10:52 EST	Dispatch Service	Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage.
11:12 - 11:17 EST	Dispatch Service	Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage.
01:20 - 01:35 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 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.
July 24, 2020
08:00 - 08:30 EST	IESO Portal	Transmission Rights Auction (TRA) will be unavailable
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 - 12:40 EST	Dispatch Service	Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage.
12:15 - 12:40 EST	IESO Reports Site	Public Report publication will be delayed.Confidential Report publication will be delayed.
July 27, 2020
10:20 - 10:40 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.
11:40 - 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.
July 19, 2020
19:00 - 21:00 EST	Online IESO	Due to planned outage Online IESO will not be available. This includes the following actions: Registration Automation System – Manage organization registration and participant authorization, Facility registration and Meter Installation processes. Notice of Disagreement (NOD) – Manage the process with participants related to settlement and invoicing concerns. Meter Trouble Report (MTR) - Manages the process related to correcting revenue meter errors. Meter Data Management (MDM) – Manage meter data report profiles and submit ad-hoc meter data requests. Prudential System - Submit Prudential Support Information. Demand Response Auction – Submit Capacity Qualification and Demand Response Auction Offer. Reliability Compliance Tool - Manage the process of collecting submittals from participants related to NERC reliability standards. Enable Capacity Export – Give the market participant the ability to sell excess capacity to neighboring jurisdictions. Online Settlement Forms - Collect market participant data required to settle the market. CDM Plan and Measures - Used by LDCs and IESO to collaborate on changes to the LDC CDM Plans. Retrofit - Manage Conservation Retrofit program and Restful API to interact with Retrofit program. Beacon System - Manage the process with external suppliers related to FIT and microFIT contract management.
July 30, 2020
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 - 12:50 EST	Dispatch Service	Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage.
July 16, 2020
10:30 - 10:35 EST	Dispatch Service	Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage.
August 5, 2020
10:20 - 10:40 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.
11:20 - 11:40 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.
08:05 - 08:35 EST	IESO Portal	Transmission Rights Auction (TRA) will be unavailable
August 10, 2020
09:00 - 11:00 EST	Sandbox System and Applications	Sandbox systems used for participant testing of IESO applications, including the IESO Sandbox Portal, Sandbox Reports Site, Sandbox EMI, and Sandbox Online IESO, will be unavailable.
12:00 - 13:00 EST	Online IESO	Due to planned outages the following actions will not be available in Online IESO: Prudential System - Submit Prudential Support Information.
August 7, 2020
07:00 - 08:00 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
12:20 EST - 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.
August 4, 2020
14:20 - 14:45 EST	Dispatch Service	Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage.
August 11, 2020
13:20 - 13:35 EST	Dispatch Service	Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage.
13:20 - 13:35 EST	IESO Reports Site	Confidential Report publication will be delayed. Public Report publication will be delayed.
15:20 - 15:35 EST	Dispatch Service	Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage.
15:20 - 15:35 EST	IESO Reports Site	Confidential Report publication will be delayed. Public Report publication will be delayed.

Planned IT Outages

Planned Outages for 12 Aug 2020

Future Outages

Past Outages