Where to find and edit your signature in Outlook on iPhone

Open the Outlook app on your iPhone and tap the menu icon (three horizontal lines) in the bottom right corner. Scroll down and tap Settings. From there, tap Mail, then scroll down to find Signature. The signature field will show whatever text you currently have set. Tap in that field to edit it, add new text, or delete the old one entirely.

Once you've made your changes, tap Done or back out of the settings screen — Outlook saves your signature automatically. The new signature will appear on all outgoing emails from that account going forward.

Key Takeaways

  • Your signature is found in Settings > Mail > Signature within the Outlook app on iPhone.
  • You can type any text you want as your signature, including your name, title, phone number, or a closing phrase.
  • Changes save automatically when you exit the signature field, so you don't need to confirm or submit anything.
  • If you have multiple email accounts in Outlook, each account can have its own separate signature.
  • You can leave the signature field blank if you don't want any signature on your emails.

Setting different signatures for different accounts

If you've added more than one email account to Outlook on your iPhone, you can set a unique signature for each one. Go to Settings > Mail, and you'll see a list of your accounts. Tap on the account you want to edit, then scroll down to the Signature field and enter the text you want for that specific account.

This is useful if you have a work email and a personal email — you can use a formal signature on your work account and something simpler on your personal one. Each account remembers its own signature independently.

What you can and cannot include in your signature

Outlook on iPhone lets you type plain text into your signature field. You can include your name, job title, phone number, website, or any closing phrase you prefer. Line breaks work too — just press Enter to move text to a new line within your signature.

You cannot add images, logos, or formatted text (bold, italics, colors) directly through the iPhone app's signature settings. If you need a signature with images or special formatting, you would need to set that up on a computer using the full Outlook desktop or web version, and it will then appear on emails sent from your iPhone.

Why your signature might not appear on replies

By default, Outlook on iPhone does not add your signature to reply emails — only to new messages you compose from scratch. This is a built-in setting in the app, not something you control in the signature field itself. If you reply to an email, your signature won't be included unless you manually add it.

This behavior is different from some other email apps, so it can feel unexpected. If you want your signature on every email including replies, you'll need to add it manually each time, or check whether your organization's Outlook settings on a computer can change this behavior.

Troubleshooting: signature not showing up

If you've set a signature but it's not appearing on your sent emails, first check that you're composing a new message rather than replying to one — as mentioned above, replies don't include signatures by default. Next, go back to Settings > Mail > Signature and confirm the text is still there and hasn't been accidentally deleted.

If the signature is set but still not showing, try closing the Outlook app completely and reopening it. Sometimes the app needs to refresh to explore signature changes. If that doesn't work, sign out of your account in Settings > Accounts, then sign back in — this forces Outlook to reload all your account settings including the signature.

Syncing your signature across devices

If you use Outlook on both your iPhone and a computer, your signature will not automatically sync between them. The signature you set on your iPhone stays only on your iPhone, and the signature on your computer stays only on your computer. You'll need to set the signature separately on each device if you want them to match.

The exception is if you use Outlook on the web (outlook.com or your organization's web version). A signature set in the web version may appear on emails sent from your iPhone if your account is configured that way, but this depends on your organization's setup. Check with your IT department if you're using a work email account.

Frequently Asked Questions

Can I use a signature with my company logo or image?

The iPhone app doesn't support images in signatures. To add a logo or image, set up your signature on a computer using Outlook desktop or the web version, and it should appear on emails sent from your iPhone. However, some organizations restrict image signatures, so check with your IT team first.

What if I don't want a signature at all?

Leave the signature field blank. Go to Settings > Mail > Signature and delete any text that's there. Your emails will be sent without any signature line.

Does my signature appear on emails I forward?

No. Forwarded emails, like replies, do not include your signature by default in Outlook on iPhone. Only new messages you compose from scratch will have your signature added automatically.

Can I have different signatures for different folders or labels?

No. Outlook on iPhone only allows one signature per email account. The same signature will be used for all new messages from that account, regardless of which folder you're in.

Will my signature changes take effect when ready?

Yes. Once you exit the Settings screen, your new signature is saved and will appear on all new emails you send from that point forward. You don't need to restart the app or confirm the change.