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 19 Dec 2018

Outage Times	Systems	Description
11:00 - 11:15 EST	IESO Portal	Prudential Manager used to monitor and retrieve prudential information will be unavailable

Future Outages

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Archive

Outage Times	Systems	Description

Outage Times	Systems	Description
September 6, 2018
13:45 - 13:50 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.
14:45 - 14:50 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.
September 5, 2018
14:00 - 14:15 EST	Outage Coordination and Scheduling System (OCSS) - Web Service (API)	OCSS Web Service will be unavailable for outage submission and retrieval.
14:00 - 14:15 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.
14:25 - 14:35 EST	Outage Coordination and Scheduling System (OCSS) - Web Service (API)	OCSS Web Service will be unavailable for outage submission and retrieval.
14:25 - 14:35 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 12, 2018
12:05 - 12:50 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.
September 27, 2018
13:20 - 13:40 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.
14:20 - 14:30 ET	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.
September 10, 2018
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.
11:15 - 11:20 EST	Online IESO	Due to planned outages the following actions will not be available in Online IESO: create a Notice of Disagreement (NOD)
11:15 - 11:20 EST	IESO Portal	Settlements Online Forms cannot be submitted or retrieved
September 13, 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
12:15 - 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	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 - 13:10 EST	Report Site	The Predispatch report will not be published.
September 20, 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
12:15 - 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	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 - 13:10 EST	Report Site	The Predispatch report will not be published.
September 25, 2018
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.
14:25 - 14:30 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.
13:25 - 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.
14:25 - 14:30 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.
September 19, 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
13:20 - 13:40 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.
13:20 - 13:40 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.
September 18, 2018
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	Report Site	The 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	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 19, 2018
07:00 - 11:00 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 Sandbox 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. Outage does not impact submission through API.Sandbox Transmission Rights Auction (TRA) will be unavailableSandbox All on-line collaboration communities will be unavailableSandbox Settlements Online Forms cannot be submitted or retrievedSandbox Meter data cannot be retrieved through the MVWeb applicationSandbox 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 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
October 1, 2018
09:15 - 09:25 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.
09:20 - 09:25 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.
09:20 - 09:25 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.
09:15 - 09:25 EST	IESO Portal	Transmission Rights Auction (TRA) will be unavailableSettlements Online Forms cannot be submitted or retrievedLoss 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 All on-line collaboration communities will be unavailableOnline Outage Request Form used for submitting or retrieving outages will be unavailableMeter data cannot be retrieved.
09:05 - 09:15 EST	IESO Portal	Prudential Manager used to monitor and retrieve prudential information will be unavailable
October 29, 2018
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.
14:25 - 14:30 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.
13:25 - 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.
14:25 - 14:30 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.
October 30, 2018
09:30 - 09:55 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.
09:30 - 09:55 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.
09:30 - 09:55 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.
09:40 - 09:50 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
12:20 - 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 - 12:40 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.
12:20 - 12:40 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.
October 28, 2018
17:00 - 19:00 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
17:00 - 19:00 EST	System Status Reports (SSR)	Loss of access to System Status Reports (SSR) via the IESO Reports site. SSRs will still be available through Message Exchange.Publication of System Status Reports will be delayed.
October 10, 2018
14:20 - 14:40 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.
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.
09:30 - 10:00 EST	Sandbox System and Applications	Sandbox systems used for participant testing of the IESO EMI application will be unavailable.
October 17, 2018
14:20 - 14:40 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.
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.
12:00 - 12:10 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 3, 2018
07:00 - 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.
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.
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 - 13:10 EST	Report Site	The Predispatch report will not be published.
October 13, 2018
09:20 - 09:40 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 RSS feeds for Advisory Notifications (Day 0 Advisory Notices, Day 1- 34 Advisory Notices, Emergency Advisory Notices) will stop publishing notices during the outage.
12:20 - 12:40 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 RSS feeds for Advisory Notifications (Day 0 Advisory Notices, Day 1- 34 Advisory Notices, Emergency Advisory Notices) will stop publishing notices during the outage.
14:20 - 14:40 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 RSS feeds for Advisory Notifications (Day 0 Advisory Notices, Day 1- 34 Advisory Notices, Emergency Advisory Notices) will stop publishing notices during the outage.
October 23, 2018
11:30 - 11:40 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.
11:30 - 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 - 12:31 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.
13:21 - 13:33 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.
11:35 - 11:45 EST	IESO Portal	Prudential Manager used to monitor and retrieve prudential information will be unavailable
11:35 - 11:45 EST	System Status Reports (SSR)	Publication of System Status Reports will be delayed.
11:35 - 11:45 EST	IESO Reports Site	Public Report publication will be delayed.Confidential Report publication will be delayed.
October 24, 2018
11:20 - 11:40 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.
09:30 - 09:40 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
12:30 - 12:40 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
October 25, 2018
09:20 - 09:40 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.
10:05 - 10:25 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.
October 11, 2018
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.
October 31, 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
12:15 - 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	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 - 13:10 EST	Report Site	The Predispatch report will not be published.
November 6, 2018
13:20 - 13:50 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.
13:20 - 13:50 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.
09:32 - 09:42 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
November 8, 2018
13:20 - 13:50 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.
13:20 - 13:50 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.
09:32 - 09:42 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
November 5, 2018
11:30 - 11:45	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.
12:00 - 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.
November 14, 2018
13:30 - 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.
November 22, 2018
09:00 - 17:00 EST	IESO Sandbox Reports Site	Testing on the Sandbox Report site will be unavailable
November 21, 2018
11:55 - 12:45 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.
November 29, 2018
11:45 - 13:00 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.
December 15, 2018
14:00 - 16:00 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
December 4, 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. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage.
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.
15:00 - 15:10 EST	Report Site	The Predispatch report will not be published.
December 18, 2018
10:00 - 13:05 EST	IESO Reports Site	Confidential Report publication will be delayed. Public Report publication will be delayed.
12:00 - 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.
December 17, 2018
10:20 - 10:25 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
10:15 - 10:25 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

Planned IT Outages

Planned Outages for 19 Dec 2018

Future Outages

Past Outages