How to Configure S/MIME in Exchange Online

In this article Step 1: Set up and publish S/MIME certificates Step 3: Sync user certificates for S/MIME into Microsoft 365 Step 4: Configure policies to install the S/MIME extensions in web browsers Step 5: Configure email clients to use S/MIME S/MIME (Secure/Multipurpose Internet Mail Extensions) is a widely accepted protocol for sending digitally signed Read More