Release notes - Microsoft Trusted Root Certificate Program

The Microsoft Trusted Root Certificate Program releases changes to our Root Store on a monthly cadence, except for December. The public can expect the following cadence for releases:

  1. Additions and non-deprecating modifications will be completed any month
  2. Certificate Authority (CA)-initiated and CA-confirmed deprecations will occur on even numbered months
  3. Microsoft-initiated deprecations will occur in February and August releases

If you are a certificate user who has active certificates chaining up to a deprecating root, please reach out to your CA to understand how changes may impact your certificates. Update packages will be available for download and testing at https://aka.ms/CTLDownload

Please note, the changes listed are accurate at the time of posting but are subject to change.

A list of Root Store participants, updated monthly, can be found here: https://aka.ms/trustcertpartners.

2021

Month Date of Release Release Notes
February March 3 Deployment Notice for February 2021
January January 26 Deployment Notice for January 2021

2020

Month Date of Release Release Notes
October October 27 Deployment Notice Posted October 27
September September 29 Deployment Notice Posted September 29
September September 3 Deployment Notice Posted September 3
August August 25 Deployment Notice Posted August 18
July July 28 Deployment Notice Posted July 27
June June 30 Deployment Notice Posted June 9
May May 19 Deployment Notice Posted May 19
April April 28 Deployment Notice Posted April 21
April Notice Posted April 1
March March 24th Deployment Notice Posted March 18
February February 25th Deployment Notice Posted February 3
January January 28 Deployment Notice Posted January 22

2019

Month Date of Release Release Notes
October November 5 Deployment Notice Posted October 11
August August 14 Deployment Notice Posted August 14
August August 27 Deployment Notice Posted August 2
July July 10 Deployment Notice Posted July 11
July July 30 Deployment Notice Posted July 2
June July 2 Deployment Notice Posted June 5
May May 28 Deployment Notice Posted May 1
April April 30 Deployment Notice Posted April 15
March March 26 Deployment Notice Posted March 6
February March 5 Deployment Notice Posted February 19
January January 29 Deployment Notice Posted January 23

2018

2018 and earlier coming soon