How to add/edit/delete signature in Outlook Web App (OWA)?

To add, edit, or delete a signature in Outlook Web App, follow these steps:

1. Log in to your "Outlook Web App" in a web browser.

2. Click "Settings" > "Options" at the top-right corner. See screenshot:

3. In the left pane, click "Settings", then scroll to the "email signature" section. Type your desired signature into the "email signature" box, and click the "Save" button at the bottom of the page.

Notes:
(1) Optionally check the "Automatically include my signature on messages I send" box if you want the signature to be added by default.
(2) To edit the signature, modify the content in the "email signature" box. To delete the signature, clear all content in the box.
(3) To manually insert the signature into an email while composing, click "More" > "Insert signature" from the message toolbar. See screenshot:

Set away messages (out of office) in Outlook Web App

Change the login password of Outlook Web App (OWA)

Add contacts to distribution group in Outlook Web App (OWA)