![]() The Root CA "DigiCert Global Root G2" is widely trusted by operating systems including Windows, macOS, Android, and iOS and by browsers such as Microsoft Edge, Chrome, Safari, and Firefox. Microsoft ECC Root Certificate Authority 2017Īs an example, this is a valid certificate with one of the new certificate chains: Microsoft RSA Root Certificate Authority 2017 New TLS certificates used by Microsoft 365 services will now chain up to one of the following Root CAs: Common Name of the CA With one of the following Intermediate CAs: Common Name of the CA Today, most of the TLS certificates used by Microsoft 365 services chain up to the following Root CA: Common Name of the CA Services began transitioning to the new Root CAs in January 2022 and will continue through October 2022. ![]() ![]() This change will not affect certificates, domains, or services used in the China or Germany national cloud instances of Microsoft 365.Īll certificate information in this article was previously provided in Microsoft 365 encryption chains no later than October 2020. ![]() This change is being made because the current Root CA will expire in May 2025.Īffected endpoints include (but are not limited to):Īdditionally, Teams and Skype for Business Online endpoints in US Government national cloud instances of Microsoft 365 will make the same change, affecting endpoints such as: Microsoft 365 is updating services powering messaging, meetings, telephony, voice, and video to use TLS certificates from a different set of Root Certificate Authorities (CAs).
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