Certificate-centered connector configuration: Make certain that your on-premises email server is configured to use a certificate to send out email to Microsoft 365, along with the Prevalent-Identify (CN) or Subject Alternate Identify (SAN) inside the certificate includes a domain name that you've got registered in Microsoft 365, and you've got https://social-galaxy.com/story2495784/5-easy-facts-about-mailwizz-support-described