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.

2019

Month Date of Release Release Notes
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