***** EXTERNAL email. Please be cautious and evaluate before you click on links, open attachments, or provide credentials. ***** Resending with updated attachment. From: ERCOT Client Services Sent: Tuesday, November 12, 2019 4:06 PM To: [log in to unmask]; [log in to unmask]; [log in to unmask]; [log in to unmask] Cc: Ercot Account Managers <[log in to unmask]>; Market Support Services <[log in to unmask]> Subject: M-A111219-01 Implementation of market-facing changes for December 2019 NOTICE DATE: November 12, 2019 NOTICE TYPE: M-A111219-01 Release - Retail/Wholesale SHORT DESCRIPTION: Implementation of market-facing changes for December 2019 INTENDED AUDIENCE: ERCOT Market Participants DAY AFFECTED: December 10 - 12, 2019 LONG DESCRIPTION: ERCOT will be implementing a number of market-facing changes in the production environment on December 10 - 12, 2019 for several systems. Please see the attached spreadsheet for the description of each change. ADDITIONAL INFORMATION: ERCOT systems may experience intermittent service interruptions during the implementation period. The systems include, but are not limited to: ยท Components of the ERCOT Market Information System (MIS) including: * Report publishing to the MIS * Downloading of extracts and reports from MIS and External Web Services (EWS) * MIS and ERCOT.com dashboards and displays Information on upcoming releases can be found on the Project Priority List (PPL)<http://www.ercot.com/services/projects/>. 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]<mailto:[log in to unmask]>. If you are receiving email from a public ERCOT distribution list that you no longer wish to receive, please follow this link in order to unsubscribe from this list: http://lists.ercot.com<http://lists.ercot.com/>. mm