NOTICE DATE: July 18, 2023

NOTICE TYPE: M-A071823-01 Release

SHORT DESCRIPTION: MOTE open for testing Operating System Upgrade for MMS UI and OS UI

INTENDED AUDIENCE: Qualified Scheduling Entities (QSEs) and Transmission Service Providers (TSPs)

DAYS AFFECTED:  July 19, 2023, July 20 – 25, 2023 15:00 - 17:00

LONG DESCRIPTION: As part of Enterprise Information Services (EIS) Tech Refresh Project, ERCOT will be upgrading the Market Manager User Interface (MMS UI) and Outage Scheduler User Interface (OS UI) Operating Systems to a newer version in the Market Operations Test Environment (MOTE) between 15:00 - 17:00 on July 19. This upgrade does not have any impacts to MMS UI and OS UI functionality. The upgraded MOTE system will be open for testing during the period of July 20 - 25, 2023.

ACTION REQUIRED: Starting July 20, 2023 until to July 26, 2023, QSEs and TSPs are recommended to conduct regression tests of the MMS UI and OS UI applications in MOTE.

CONTACT: If you have any questions, please contact your ERCOT Account Manager. You may also call the general ERCOT Client Services phone number at (512) 248-3900 or contact ERCOT Client Services via email at [log in to unmask].

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dg