Outlook for Mac Signature Not Saving? 9 Ways to Fix It

Sarabjeet Kaur | mac outlook olm outlook for mac outlook mac Software Technology | 4 minutes read | Modified on: 24-10-2026

Are you facing the Outlook for Mac signature not saving issue? If your email signature disappears after editing, fails to save, or does not appear in new emails, the problem may be related to Outlook settings, synchronization, or your current Outlook profile.

In this blog post, we’ll explain how to troubleshoot signature-saving problems in Outlook for Mac and make sure your signature appears correctly in new messages, replies, and forwards.

Why Is Outlook for Mac Not Saving Your Signature?

Several issues can prevent Outlook from saving or applying an email signature:

  • Outlook is experiencing a temporary synchronization issue.
  • The signature was edited but the changes were not retained.
  • The default signature has not been assigned to the correct email account.
  • Outlook needs to be updated or restarted.
  • The signature contains formatting or images that are causing problems.
  • Your Outlook profile may have a configuration issue.

1: Close the Signature Settings Window Correctly

  1. Open Microsoft Outlook on your Mac.
  2. Select Outlook > Settings.
  3. Under Mail, select Signatures.
  4. Select the signature you want to edit.
  5. Make a small change to the signature text.
  6. Close the Signatures window.
  7. Open a new email and check whether the change is retained.

2: Restart Outlook for Mac

  1. Save any open email drafts.
  2. Quit Outlook completely using Outlook > Quit Outlook or Command + Q.
  3. Reopen Outlook.
  4. Navigate to Settings > Signatures.
  5. Edit the signature and check whether the changes persist.

3: Create a New Email Signature

  1. Open Outlook > Settings > Signatures.
  2. Select the option to add a new signature.
  3. Give it a unique name, such as Test Signature.
  4. Enter simple text without images, tables, or complex formatting.
  5. Close the settings window.
  6. Reopen the signature editor and check whether the new signature remains.

4: Check Your Default Signature Settings

  1. Open Outlook > Settings > Signatures.
  2. Find the default signature settings.
  3. Select the correct email account.
  4. Choose your signature for new messages.
  5. Select a signature for replies and forwards if required.
  6. Close Settings and compose a test email.

5: Test the Signature Manually

  1. Create a new email.
  2. Find the Signature option in the message toolbar.
  3. Select your saved signature manually.
  4. Check whether the signature appears correctly.
  5. Send a test email to an address you can access, if appropriate.

6: Update Outlook for Mac

  1. Open Outlook.
  2. Select Help > Check for Updates if available.
  3. Follow the instructions in Microsoft AutoUpdate.
  4. Install applicable updates.
  5. Restart Outlook and test your signature again.

7: Simplify Your Signature Formatting

Complex HTML, copied formatting, embedded images, or tables may contribute to rendering problems.

Try creating a plain-text signature containing only your name, job title, and contact details. If it saves successfully:

  • Add hyperlinks individually.
  • Insert your logo using Outlook’s supported image options.
  • Avoid copying complex content directly from websites.
  • Test the signature after each change.

8: Refresh Outlook’s Configuration

If your signature still won’t save, try switching Outlook versions and switching back, if available. Before making changes, keep a backup of your signature. If the issue persists, contact Microsoft Support.

9: Create a New Outlook Profile

A corrupted Outlook profile may cause signature issues. Create a separate test profile using Microsoft’s official instructions and check whether the signature saves correctly. Don’t delete your original profile until you’ve verified that your important data is safe.

Also Read- How to Create A New Profile in Outlook Mac

Bonus Tip: Convert Outlook for Mac OLM Files to Multiple File Formats

If you need to migrate your Outlook for Mac emails or save them in another format, CubexSoft OLM Converter for Mac & Windows offers multiple output options to suit different requirements.

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The software supports formats such as MBOX, PDF, HTML, RTF, PST, MSG, EML, EMLX, ICS, DOC, CSV, and more, along with migration options for email platforms and services such as Thunderbird, Gmail, Office 365, Exchange Server, etc.

Explore Mac OLM File Converter to learn more about its supported formats and conversion features.

Frequently Asked Questions

1. Why does my Outlook for Mac signature disappear after restarting?

Your changes may not have saved correctly. Recreate the signature and check again after restarting Outlook.

2. Is there a Save button for signatures in New Outlook for Mac?

No, changes are generally saved automatically. Reopen Settings to verify your changes.

3. Why is my signature not appearing in new emails?

If your Outlook for Mac signature is not saving or appearing in new emails, check your default signature settings and ensure the correct signature is assigned to your email account

Conclusion

The Outlook for Mac signature not saving issue can be frustrating, especially when your email signature disappears or your changes are not saved. By checking signature settings, simplifying formatting, and updating Outlook, you can identify and fix the problem. If the issue continues, consider contacting Microsoft Support for further assistance.