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January 2021 Deployment Notice - Microsoft Trusted Root Program

  • Article

On Tuesday, January 26, 2021, Microsoft will release an update to the Microsoft Trusted Root Certificate Program.

This release will add to the following roots (CA \ Root Certificate \ SHA-1 Thumbprint):

  1. Telia Company \ Telia Root CA v2 \ B999CDD173508AC44705089C8C88FBBEA02B40CD

This release will add the Code Signing to the following roots:

  1. Atos \ Atos TrustedRoot 2011 \ 2BB1F53E550C1DC5F1D4E6B76A464B550602AC21

Note

  • As part of this release, Microsoft also updated the Untrusted CTL time stamp and sequence number. No changes were made to the contents of the Untrusted CTL but this will cause your system to download/refresh the Untrusted CTL. This is a normal update that is sometimes done when the Trusted Root CTL is updated.
  • The update package will be available for download and testing at: https://aka.ms/CTLDownload
  • Signatures on the Certificate Trust Lists (CTLs) for the Microsoft Trusted Root Program changed from dual-signed (SHA-1/SHA-2) to SHA-2 only. No customer action required. For more information, please visit: https://support.microsoft.com/en-us/help/4472027/2019-sha-2-code-signing-support-requirement-for-windows-and-wsus