Release notes - Microsoft Trusted Root Certificate Program

  • Article

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 occur on even numbered months
  3. Microsoft-initiated deprecations occur in February and August releases

If you are a certificate user who has active certificates chained 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

Note that 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.

2024

Month Date of Release Release Notes
March March 26 Deployment Notice for March 2024
February February 27 Deployment Notice for February 2024

2023

Month Date of Release Release Notes
November November 28 Deployment Notice for November 2023
March March 28 Deployment Notice for March 2023
February February 28 Deployment Notice for February 2023

2022

Month Date of Release Release Notes
November November 29 Deployment Notice for November 2022
October October 25 Deployment Notice for October 2022
September September 27 Deployment Notice for September 2022
August August 23 Deployment Notice for August 2022
June June 28 Deployment Notice for June 2022
May May 17 Deployment Notice for May 2022
April April 26 Deployment Notice for April 2022
February February 22 Deployment Notice for February 2022

2021

Month Date of Release Release Notes
October October 26 Deployment Notice for October 2021
September September 28 Deployment Notice for September 2021
August August 24 Deployment Notice for August 2021
June June 22 Deployment Notice for June 2021
May May 25 Deployment Notice for May 2021
April April 29 Deployment Notice for April 2021
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 24 Deployment Notice Posted March 18
February February 25 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