Configuring the Internet Mail Service for Use with Signed S/MIME Mail

To send signed Secure/Multipurpose Internet Mail Extension (S/MIME) mail through the Microsoft Exchange Server Internet Mail Service, you must first configure the Internet Mail Service to support signatures.

1. In the Administrator window, choose Connections.
2. Double-click Internet Mail Service.
3. On the General property page, select Clients Support S/MIME Signatures.

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