NOTICE DATE: May 14, 2010 NOTICE TYPE: M-A051410-01 Release - Retail/Wholesale SHORT DESCRIPTION: Update to MPIM roles INTENDED AUDIENCE: MPIM USAs and users DAY AFFECTED: May 17, 2010 LONG DESCRIPTION: ERCOT is updating the provisioning of roles for the Market Information System (MIS) with a Release planned for Monday, May 17, 2010, from 17:30 through 18:30. ADDITIONAL INFORMATION: Market Participant Identity Management (MPIM) will be unavailable during the outage. MPIM and the following User Security Administrator (USA) functions will be affected: * Certificate role management * New account creation * Certificate request/revocation * Account termination * Reports 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 an 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/>. dh