Certificate-based connector configuration: Be sure that your on-premises email server is configured to make use of a certificate to ship email to Microsoft 365, as well as Frequent-Title (CN) or Subject matter Alternate Identify (SAN) in the certificate contains a domain name that you've registered in Microsoft 365, and you've https://bookmarkcitizen.com/story17205357/top-guidelines-of-cloudflare-free-ssl