Update Signature using Webmail

While signed into webmail, click on the cog wheel in the top-right of the window to open the options menu.

Click View all Outlook settings.

Within the Mail tab, select Compose and reply.

Insert the signature into the text box. The easiest way to properly reproduce the formatting is to copy and paste from an existing signature and replacing the copied name and title with your own.

Check the two boxes below the signature field if you'd like your signature to automatically appear on new messages and replies.

Click Save when you are finished.