Office 365 (Outlook on the Web) - Create and Add a Signature
If you use both the Outlook Client and Outlook on the Web, you will need to create a signature file within each platform.
1. Go to Settings
> View all Outlook settings > Compose and reply.
2. Under Email signature, type your signature and use the available formatting options to change its appearance.
- If you want your signature to appear at the bottom of all new email messages that you compose, select the Automatically include my signature on new messages I compose check box.
- If you want your signature to appear on messages that you forward or reply to, select the Automatically include my signature on messages I forward or reply to check box.
3. Select Save when you're done.
For the most current instructions, please check out the following Microsoft help article: https://support.office.com/en-us/article/Create-and-add-an-email-signature-in-Outlook-on-the-web-5ff9dcfd-d3f1-447b-b2e9-39f91b074ea3.