How to add a signature to each version of Outlook

To add a signature to each version of Outlook, follow the specific steps below for your platform. Note that signatures do not always sync automatically across all devices, so you may need to set them up on each. 

Outlook Classic (Desktop)

1. Open Outlook Classic and click New Email.
2. On the Message tab, select Signature > Signatures.
3. Under Select signature to edit, click New, type a name for the signature, and click OK.
4. In the Edit signature box, compose your signature.
5. Under Choose default signature, select the signature name for New messages and/or Replies/forwards.
6. Click OK. 

New Outlook (Windows/Mac)

1. Click the Settings (gear icon) in the top-right corner.
2. Go to Accounts > Signatures (or Mail > Compose and reply in some versions).
3. Click + New signature, give it a name, and type your content in the editor.
4. Under Select default signatures, use the dropdowns to choose this signature for New messages and Replies/forwards.
5. Click Save. 

Outlook Mobile (iOS & Android)

1. Open the app and tap your profile icon or the Home icon in the top-left.
2. Tap the Settings (gear icon) at the bottom-left.
3. Scroll down to the Mail section and tap Signature.
4. If you have multiple accounts, you can toggle Per Account to set different signatures.
5. Type your signature in the text box and tap the Checkmark or Done to save. 

Outlook Online (Web)

1. Sign in at Outlook.com.
2. Click the Settings (gear icon) in the top-right corner.
3. Navigate to Mail > Compose and reply.
4. In the Email signature section, click + New signature, name it, and enter your details.
5. Select the signature in the dropdowns for New messages and Replies/forwards.
6. Click Save.