How to Fix Unable to Add or Edit an Email Signature in Outlook 2016
Question details
Users cannot add, edit, or modify email signatures in the Outlook 2016 desktop application.
- Product
- Microsoft Outlook 2016
- Device & OS
- not provided
- Scenario
- Attempting to create a new email signature or edit an existing one after a recent Office installation, repair, or policy update.
- Observed behavior
- The signature settings button does not respond, or changes to signatures, stationery, and fonts cannot be saved or accessed.
Before making policy changes or repairing your installation, verify whether your Outlook account is connected via Exchange or an IMAP service (like Gmail), as the troubleshooting steps differ significantly for each.
Enable Email Signatures in Exchange Admin Center (For Exchange Accounts)
If your mailbox is managed through Exchange Online, an administrator may need to adjust the Outlook Web App policies to allow signature editing.
While Outlook Web App (OWA) policies typically apply to web users, certain configurations and user experience restrictions can inadvertently sync and disable signature editing in the desktop client as well.
Have your administrator sign in to the Exchange admin center using their administrator credentials.
In the left-hand navigation menu, go to Permissions, and then select the Outlook Web App Policies tab.
Select the policy that applies to the affected users and click the edit icon (pencil).
Open Features, go to More options, and locate the User experience section. Check the box to enable 'Email signature' and save the changes.
Repair the Office Installation (For IMAP/Gmail Accounts)
If you are using an IMAP account and cannot access signature settings, repairing the Office suite can fix corrupted registry keys or installation files.
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Frequently Asked Questions
Why is my Outlook signature button completely unresponsive?
An unresponsive signature button often occurs due to a corrupted registry key pointing to a wrong or older Office installation path, or because an Exchange administrator has disabled the signature feature via Outlook Web App policies.
Where are Outlook 2016 signatures stored on my computer?
Outlook signatures are typically saved in your Windows user profile. You can access them directly by pressing Windows + R, typing '%appdata%\Microsoft\Signatures', and pressing Enter.
Does modifying the Outlook Web App policy affect the desktop application?
Normally, Outlook Web App (OWA) policies only apply to users accessing their mail through a browser. However, in certain Exchange server setups, specific user experience restrictions like disabling email signatures can inadvertently affect the Outlook desktop client.
Will running an Office repair delete my existing Outlook emails and signatures?
No, running a Quick Repair or Online Repair of Microsoft Office preserves your Outlook data files (.pst/.ost) and your signature files. However, it is always a good practice to back up your important emails and your Signatures folder before performing any major system repairs.
