Outlook Signature Disappears After Restart: How to Make It Persist

Your Outlook signature vanishes every time you close and reopen the program. This happens because the signature files are stored in a temporary folder that gets cleared. The default location for signatures is not a permanent part of your user profile. This article explains how to change the storage location and configure settings to keep your signature permanently.

Why Outlook Signatures Get Deleted on Restart

Outlook stores signature files, which include the HTML, text, and images, in a specific folder on your computer. By default, this is a temporary AppData folder. System cleanup tools, Windows updates, or profile corruption can delete the contents of this temporary location. When Outlook restarts and cannot find the signature files, it appears as if your signature has disappeared. The issue is not with the signature setting itself but with the physical files being removed from their storage path.

Another common cause is using a roaming user profile or a managed corporate computer where temporary files are wiped at logoff. If the signature was created while Outlook was in a unusual state, it might have been saved to an incorrect path initially. The core solution involves moving the signature storage to a more permanent directory or recreating the signature to ensure it is built in the right place.

Steps to Permanently Save Your Outlook Signature

Follow these methods to stop your signature from being deleted. Start with the first method, as it is the simplest and most common fix.

Method 1: Recreate the Signature

1. Open the Signatures Menu
   In Outlook, go to File > Options > Mail. Click the Signatures button in the Compose messages section.
2. Delete the Problematic Signature
   In the Signatures and Stationery dialog, select the signature that disappears from the list. Click the Delete button, then confirm the deletion.
3. Create a New Signature
   Click the New button. Give your signature a distinct name and click OK. Rebuild your signature with the desired formatting, font, and links in the editing box.
4. Assign the New Signature
   In the Choose default signature section, select your new signature for both New messages and Replies/forwards from the dropdown menus. Click OK to save and close all open dialog boxes.

Method 2: Change the Default Signature Storage Location

This method uses the Windows Registry to force Outlook to use a permanent folder. Close Outlook completely before you begin.

1. Open the Registry Editor
   Press Windows key + R, type regedit, and press Enter. If prompted by User Account Control, click Yes.
2. Navigate to the Outlook Key
   In the Registry Editor, go to HKEY_CURRENT_USER\Software\Microsoft\Office. Expand the Office folder and look for a key with your Office version number, like 16.0. Inside it, navigate to Outlook > Preferences.
3. Create a New String Value
   Right-click on the Preferences key, select New, and then choose String Value. Name this new value ForceSignaturePath.
4. Set the New Folder Path
   Double-click the new ForceSignaturePath string. In the Value data field, type a permanent path, such as C:\Users\[YourUsername]\Documents\Outlook Signatures. Click OK.
5. Restart Outlook and Recreate
   Close the Registry Editor. Open Outlook and recreate your signature using Method 1. It will now be saved in the new, permanent directory.

If Your Signature Still Does Not Stay

Outlook Prompts to Choose a Profile on Startup

If Outlook asks you to choose a profile every time it opens, your signature settings are tied to a specific profile that is not loading automatically. Fix this by setting a default profile. Go to Control Panel > Mail (32-bit) > Show Profiles. Select Always use this profile and choose your main account from the list. Click Apply and OK.

Signature is Missing from Only One Account

In Outlook with multiple accounts, signatures are assigned per email account. Open File > Options > Mail > Signatures. In the Signatures and Stationery dialog, ensure you have selected the correct email account from the top-right dropdown menu before assigning a default signature. You must set it for each account individually.

Corporate Group Policy is Removing Files

On a managed work computer, IT policies often clean the AppData\Roaming folder. The Registry method to change the ForceSignaturePath to your Documents folder may be blocked. Contact your IT support to request an exception for the signature folder path or to provide a approved method for persistent signatures.

Signature Storage Methods Comparison

Item	Default AppData Storage	Custom Folder via Registry
Storage Path	%AppData%\Microsoft\Signatures	Any user-defined folder like Documents
Persistence	Low, often cleared by system tools	High, treated as a user document
Roaming Profile	May sync, but can cause conflicts	Does not roam unless folder is synced
Administrator Rights	Not required to create signatures	Required to edit the Windows Registry
Best For	Single-use, temporary signatures	Permanent business signatures on a personal PC

You can now stop your Outlook signature from disappearing. Setting a default signature for both new messages and replies is a critical final step. For more control, explore using the Registry to define a custom storage path. An advanced tip is to back up your entire signature folder after creating it, allowing for quick restoration if files are ever corrupted.