You are using an out of date browser. It may not display this or other websites correctly. You should upgrade or use an alternative browser.
tls trust
About this tag
The tls trust tag covers discussions about configuring and verifying trust in TLS certificate chains, particularly for Microsoft Exchange Online and other Microsoft services. A recurring theme is the need to ensure that intermediate and root Certificate Authorities (CAs) like DigiCert Global Root G2 are trusted on systems performing full certificate-chain validation. Failure to do so can disrupt mail flow, TLS connections, and authentication. Topics include operational risks for hybrid Exchange environments, third-party mail gateways, legacy systems, and custom software that validates certificate chains. The tag focuses on practical, time-sensitive trust configuration tasks rather than general TLS theory.
Microsoft is urging organizations that send or receive mail with Exchange Online to make sure the DigiCert Global Root G2 root certificate (and its subordinate CAs) is trusted on any systems that perform full certificate-chain validation — failure to do so may interrupt mail flow and TLS-based...