How to Digitally Sign an Individual E-mail Message in Outlook Web Access
This article explains how to sign e-mail messages using Outlook Web Access.
Before You Begin
Log on to Outlook Web Access with the S/MIME control installed as a user who has a certificate.
Procedure
To digitally sign an individual e-mail message
Click New to compose a new message.
Add a recipient for the message and fill out the message fields.
On the toolbar, select the Add digital signature to this message button.
The Add digital signature to this message button
Click Send.