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Outlook Signature Troubleshooting (Manual/Copy Paste Setup)

Outlook signature not showing? Learn how to fix it in Outlook desktop and web by checking signature settings, email format, and common technical issues.

Who this guide is for: This article helps you fix an Outlook signature that you set up manually in Outlook's own signature settings, for example after copying and pasting your WiseStamp signature (the copy/paste method). For the full manual setup steps, see Deploy Your Signature Using Copy/Paste.

If your signature is deployed through the WiseStamp Outlook Add-In (it appears automatically without you pasting it into Outlook), this guide is not for you. See WiseStamp Outlook Add-In Installation instead.

It can be frustrating when a signature you set up manually in Outlook suddenly disappears. Whether you are using Outlook on the web or the desktop application, this guide provides a step-by-step approach to diagnosing and fixing the issue.

1. Verify Your Signature Configuration

The most common cause is simply that the signature isn't assigned to your outgoing messages.

For Outlook Desktop

  1. Navigate to File > Options > Mail.

  2. Under the Compose messages section, click the Signatures button.

  3. In the Signatures and Stationery window, look at the Choose default signature section on the right.

  4. Ensure your specific signature is selected in the dropdown menus for both New messages and Replies/forwards.

  5. Click OK to save.

Getting to Settings might look a little different depending on your Outlook version. Navigate through your Outlook to Settings, and you’ll find the section to manage your email signature there.

For Outlook Web (Outlook.com / Outlook Web App)

  1. Click the Gear Icon (Settings) in the top-right corner.

outlook.com signature not showing step 3

2. Select View all Outlook settings at the bottom of the pane.

outlook signature not showing view all settings

3. Go to Mail > Compose and reply.

compose and reply email signature window on outlook.com

4. Scroll down to the Email signature section.

5. Check the boxes for:

  • “Include my signature on new messages I compose”

  • “Include my signature on messages I forward or reply to”

6. Click Save.

2. Check the Email Format (HTML vs. Plain Text)

Outlook signatures—especially those with logos, links, or colors—often fail to load if your email format is set to Plain Text.

  • To Fix: Go to File > Options > Mail. Under Compose messages, ensure the dropdown for "Compose messages in this format" is set to HTML.

3. Advanced Technical Fixes

If your settings are correct but the signature still won't appear, try these system-level solutions:

  • Update Outlook: Software bugs can interfere with signatures. Go to File > Office Account > Update Options > Update Now.

  • Run in Safe Mode: To see if a third-party add-in is blocking your signature, press Windows + R, type outlook /safe, and hit Enter. If the signature works here, disable your add-ins one by one to find the culprit.

  • Repair Office: If files are corrupted, go to Control Panel > Programs and Features, select your Office installation, click Change, and then select Repair.

  • Reset the Navigation Pane: If the interface is glitching, close Outlook, press Windows + R, type outlook.exe /resetnavpane, and hit Enter.

Troubleshooting FAQs

Why isn't my signature showing in replies or forwards?

For Outlook Desktop, ensure your specific signature is selected for replies by going to File > Options > Mail > Compose messages > Signatures > Choose default signature section > select your specific signature in the Replies/forwards dropdown menu.

For Outlook Web, ensure your specific signature is selected for replies by going to Mail > Compose and reply > check the box for “Include my signature on messages I forward or reply to”

Why isn't my signature showing on my phone?

Signatures do not sync across devices, and WiseStamp does not support automatic signature switching in the Outlook Mobile app. You need to configure the signature manually on your phone: copy your signature and paste it into the native signature settings in the Outlook Mobile app.

Why are the images in my signature broken?

This usually happens if the image was linked to a web URL that is no longer active. Re-upload the image directly from your computer.

Why doesn't my signature appear on a shared mailbox?

Shared mailboxes often require you to manually select a signature each time, as they do not always trigger the default user signature.

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