***** EXTERNAL email. Please be cautious and evaluate before you click on links, open attachments, or provide credentials. ***** NOTICE DATE: May 18, 2018 NOTICE TYPE: M-A042718-02 Release - Retail/Wholesale SHORT DESCRIPTION: Reminder - Implementation of market-facing changes for May 2018 INTENDED AUDIENCE: ERCOT Market Participants DAYS AFFECTED: May 29 - 31, 2018 LONG DESCRIPTION: ERCOT will be implementing a number of market-facing changes in the production environment on May 29 - 31, 2018 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: ********* Components of the ERCOT Market Information System (MIS) including: o Report publishing to the MIS o Downloading of extracts and reports from MIS and External Web Services (EWS) o MIS and ERCOT.com dashboards and displays ********* Texas Renewable Energy Credit Trading Program o Texas Renewables - www.texasrenewables.com<https://urldefense.proofpoint.com/v2/url?u=http-3A__www.texasrenewables.com&d=DwIFAg&c=trp9rTvIdyEWh1VWB5x8_2JiPaB5oGZOtWPDws2_VoY&r=neGuCzL_X6x1s7qZM6ZAC_Rtl33TCbxYuxfTMTAn9b_aw_S_JW7X70089vUXR-dS&m=bIziY1TrP3OYFHHUawT47JiH8jrk9YUy3NSw1SxMDf4&s=d2DYSImDnavtUPqTb0y4tIvVt5Hcz5McPqgF8pGSOXw&e=> 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. sa