Hello Michael,
Welcome to Microsoft Community!
First and foremost, we would like to apologize for not being able to provide you a quick resolution in a timely manner.
Allow me to assist you on how to edit your signature in Outlook.com. To start with, you should be able to change or edit your email signature. Based from what you've shared, it appears that you're not on your Inbox page while
following the steps that was provided by Abdulrehman Altaf. Please ensure that you're on your Inbox page then follow the steps below.
- Click the Gear icon on the upper right part of your page.
- Click Options.
- Under Writing email, click on Formatting, font and signature
- Enter the desired email signature and then click
Save.
If the issue still persists, we’d like you to provide us the answers to the following questions below so we could investigate and eliminate the possible causes of this issue:
- Does the issue happen when using a different computer?
- Do other Microsoft accounts encounter the same issue when using your computer?
- Does the same thing happen when you access your account from the same computer with a different browser (Internet Explorer, Firefox, Safari or Google Chrome)?
We look forward to hearing from you.