How to Add a Signature in Outlook (Every Version, Step by Step)

• 25 June 2026
• by: Hannah Wexford
• in: Email services
• Tags: email setup, email signature, outlook signature, outlook tips
• note: no comments

Learn how to add a signature in Outlook across classic desktop, new Outlook, web, and mobile. Set defaults, format it cleanly, and fix the per-device gotcha.

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