The process to add a signature in Outlook.com is different from the process to add a signature in the Outlook desktop app. The following steps will guide you on how to add a signature in Outlook.com.

The browser being used for accessing Outlook on the web also must have the S/MIME extension installed. If it is not, you will see a message like one of the following: "The digital signature on this ...

IT STAFF / ADVANCED: Learn how to enable digital signatures with Outlook on the web (outlook.office.com), and how to sign and encrypt messages, and how to send. Learn more about Outlook on the web - ...