The process to add a signature in Outlook.com is different from the process to add a signature in the Outlook desktop app. The following steps will guide you on how to add a signature in Outlook.com.

First, you can remove the signature manually ... you do not need to restart your computer. However, if Outlook was opened during the change, you need to restart the Outlook app.

Either way, it's easy to do. If you want to make a permanent change to a signature you insert in Outlook messages all the time, you can do that easily using the Signatures and Stationary dialog box.

Outlook allows users to select a default signature for new messages as well ... the signature box in "Compose and reply." You can also change the font, size, color and format of your signature ...

Sometimes, you may want to modify the signature in your Outlook email due to a change in job title, new contact details, ...