Certificate-centered connector configuration: Make certain that your on-premises email server is configured to employ a certificate to send out email to Microsoft 365, plus the Typical-Title (CN) or Subject Alternate Identify (SAN) inside the certificate consists of a domain name that you've got registered in Microsoft 365, and you've got https://pr1bookmarks.com/story17187652/new-step-by-step-map-for-azure-support