***** EXTERNAL email. Please be cautious and evaluate before you click on links, open attachments, or provide credentials. ***** NOTICE DATE: June 15, 2017 NOTICE TYPE: M-B052417-03 Planned Maintenance SHORT DESCRIPTION: Implementation of Web Application DNS changes INTENDED AUDIENCE: ERCOT Market Participants DAY AFFECTED: June 22, 2017 17:30 and 20:30 LONG DESCRIPTION: ERCOT is implementing changes to the Domain Name System (DNS) resource name indicated below. As a result, IP addresses are subject to change without notice. Therefore, Fully Qualified Domain Names (FQDNs) must be used to reference ERCOT resources instead of hard-coded IP addresses. The following URL is affected by this change: Site (URL) Fully Qualified Domain Name (FQDN) Current IP Address To-Be IP Address ERCOT Website (http://www.ercot.com/) www.ercot.com<http://www.ercot.com/> 66.128.16.71 192.230.66.144 Market Participants (MPs) are encouraged to ensure their whitelists include the FQDN to avoid any interruption of service. The changes will be implemented between the hours of 17:30 and 20:30 on June 22, 2017. Based on MP configurations users may experience an outage of up to 30 minutes if attempting to access this site during the change window. ADDITIONAL INFORMATION: For issues connecting to the website, it is recommended that MPs: ********* Clear their browser history. ********* Restart their browsers. ********* Contact the ERCOT Help Desk by phone at (512) 248-6800 or via email at [log in to unmask] if an error message is received stating "Access Denied, Powered by Incapsula". 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. sa ######################################################################## To unsubscribe from the NOTICE_OUTAGES_RETAIL list, click the following link: http://lists.ercot.com/scripts/wa-ERCOT.exe?SUBED1=NOTICE_OUTAGES_RETAIL&A=1