***** EXTERNAL email. Please be cautious and evaluate before you click on links, open attachments, or provide credentials. *****

NOTICE DATE: December 22, 2020

NOTICE TYPE: R-A122220-01 Retail NAESB Data Exchanges

SHORT DESCRIPTION: NAESB - Deprecation of all TLS versions except TLS 1.2 in RMTE (Retail Market Test Environment) and Production Environment

INTENDED AUDIENCE: All Market Participants that exchange NAESB transmissions with ERCOT

DAYS AFFECTED: January 31, 2021 and April 4, 2021

LONG DESCRIPTION: ERCOT will no longer support TLS 1.0; and will support TLS 1.2 exclusively for NAESB transactions in RMTE beginning January 31, 2021.  The expected Production Environment cutover will be April 4, 2021.

Flight 0221 testing will be conducted exclusively on TLS 1.2.

ACTION REQUIRED: All Existing and potential new Competitive Retailers (CRs), Transmission Distribution Service Providers (TDSPs) and Non Opt-In Entities (NOIEs) should confirm their usage of TLS 1.2 in NAESB transmissions sent and received with ERCOT.

Cutover Dates are:

The RMTE can be used to test NAESB connectivity exchanges on an ad hoc basis at any time as prescribed in the Retail Market Test Environment User Guide.

ADDITIONAL INFORMATION: The “Retail Market Test Environment User Guide” can be found on the Texas Retail Market Testing page of ERCOT.com.

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].

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.