Outlook Web
Click the gear icon at the top of Outlook. If a short menu opens first, choose View all Outlook settings. You should see a Settings window with Account, General, Mail, Calendar, and People.
iLook for the highlighted control in the preview.
Do not open Mail → Compose. That page only changes message format, paste behavior, and undo send. Choose Accounts on the left (some versions say Account), then Signatures in the next column.
iKeep the original formatting when pasting.
Signatures
Add signature
Click + Add signature and name it. Paste once into the editor (Ctrl+V / ⌘V). If you only see the name in the list, click the pencil to open it and paste there. Then change Default for new messages and Default for replies and forwards from (No signature) to this signature.
iKeep the original formatting when pasting.
Email signature
You’re all set
Open a new message in Outlook on the web to check that everything looks just right.
