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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 30/03/2017

Outage Times System(s) Description
09:45 - 09:50 EST IESO Portal Settlements Online Forms cannot be submitted or retrieved

Future Outages

Outage Times System(s) Description
April 19, 2017
12:15 - 12:45 EST Message Exchange Loss of access to Message Exchange will result in the following applications being impacted:
  • Automated dispatch instructions will be unavailable. The IESO will manually dispatch by phone as necessary.
  • Administrative pricing will be used.
  • Pre-dispatch and dispatch schedules and prices may not be updated.
12:15 - 16:30 EST Day-Ahead Optimization System (DAOS) The Eligible Energy Limited Resource Optimization (EELR) run of the Day-Ahead Commitment Process (DACP) DAOS will not occur:
  • EELRs will be unable to resubmit their offers for consideration in the DACP after the initial DAOS run
  • If the initial DAOS run is successful, it will be considered the Schedule of Record
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.