NOTICE DATE: April 8, 2013 NOTICE TYPE: M-A040813-01 Outage Retail/Wholesale SHORT DESCRIPTION: Unplanned MPIM outage INTENDED AUDIENCE: All Market Participants DAY AFFECTED: April 8, 2013 LONG DESCRIPTION: The Market Participant Identity Management (MPIM) system experienced an outage beginning around midnight and ending at approximately 10:45 AM today. Market Participant User Security Administrators (USAs) were unable to issue, renew or revoke certificates. The issue has been resolved and MPIM is fully functional. ADDITIONAL INFORMATION: Details will be provided on the monthly IT Incident Summary Report. 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. ka