OWA—Adding a signature to all messages
A signature is a text field or image that is added to all outgoing messages automatically. In this tutorial, we will create a signature and add it to all outgoing messages.
Start by clicking Options.

Then go to Settings on the far left and select the Mail tab. You can type your signature as you would like it to appear in your outbound email. Check the box for Automatically include my signature on messages I send. When you are ready, you can click Save.

Your new signature is now set and will show up in all outgoing emails.
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