Is Your On-Premise Exchange Server Ready for March 22nd 2026?
If you run an on-premises Exchange Server or any Windows-based SMTP relay that sends mail to or receives mail from Exchange Online, then you might have a hard deadline coming up: March 22, 2026. Miss it, and you can risk breaking your mail flow, if the Root Certificates used by Exchange is not updated. What Is Changing Microsoft Exchange Online is switching its TLS certificates to the DigiCert Global Root G2 certificate authority. This is …