How to change your email signature in Outlook

New Outlook and Outlook on the web

New Outlook for Windows and Outlook in a browser, Outlook.com included, change a signature the same way.

1. 01Select Settings.
2. 02Select Accounts, then Signatures.
3. 03Select the Edit signature button next to the signature you want to change.
4. 04Make your changes.
5. 05Select Save.
6. 06To change where it is used, tick or clear the checkboxes at the bottom for new messages and for replies and forwards.

Microsoft says that if you use both Outlook and Outlook on the web with a Microsoft account, you need to set up the signature in both. If these steps don't match what you see, you may not be on new Outlook yet: try the classic Outlook steps below.

Classic Outlook for Windows

The long-standing desktop app, which Microsoft's help calls classic Outlook.

1. 01Select File, then Options, then Mail, then Signatures.
2. 02Under Select signature to edit, select the signature you want to change.
3. 03Make your changes in the Edit signature box.
4. 04Select Save, then OK.
5. 05To change which one is used, under Choose default signature pick it in New messages and in Replies/forwards, or choose (none).

You can also reach Signatures from a new email: on the Message menu, select Signature, then Signatures.

Outlook for Mac

1. 01On the Outlook menu, select Settings.
2. 02Under Mail, select Signatures.
3. 03Under Signature name, select the signature you want to change, then select Edit.
4. 04Update your signature, then close the Signatures window.
5. 05To change which one is used, under Set default signature select the account, then set For new messages and For replies or forwards.

With more than one account, Microsoft says to set the default signature for each one. In legacy Outlook for Mac, Signatures is under Email, and the defaults are under Choose default signature, as New messages and Replies/forwards. Microsoft ends support for legacy Outlook for Mac in October 2026.

The Outlook app on iPhone and Android

1. 01Open Settings.
2. 02Under Mail, tap Signature.
3. 03Edit your signature. To give each account its own, turn on Per Account Signature.

Microsoft's help doesn't say whether the app shares the signature you set on your computer, so change it here too.

Replace it with a new signature

Open the old signature, clear it, and paste the new one in its place.

1. 01Make the new signature in esigna's free Editor and choose Copy signature.
2. 02Open the signature you want to replace, as above for your version of Outlook.
3. 03Select everything in the editing box and delete it.
4. 04Paste the new one (Ctrl+V, or ⌘V on a Mac) and save.

Keeping the same signature, rather than adding a second one, means your default settings for new messages and replies stay as they were.

Where is the signature in Outlook

The quickest way in, for each version of Outlook.

1. 01New Outlook and Outlook on the web: Settings, then Accounts, then Signatures.
2. 02Classic Outlook for Windows: File, then Options, then Mail, then Signatures.
3. 03Outlook for Mac: the Outlook menu, then Settings, then Signatures under Mail.
4. 04The Outlook app: Settings, then Signature under Mail.