How to Clear Cache in Outlook for Troubleshooting ExSign Add-in Issues

ExSign Email Signatures for Microsoft Exchange Server
Purpose:

 If you're experiencing issues with the ExSign Outlook add-in, clearing the Outlook cache can help resolve common problems. For instance:
  • The ExSign add-in appears in Outlook on the web but not in the desktop (classic) Outlook for Windows.
  • Email signatures are not being automatically added.
This guide will walk you through clearing the Outlook cache to help resolve such issues.

 Before You Begin
This process involves deleting local cache files. While these files are safe to remove, we recommend backing them up beforehand.

Step-by-Step Guide
  1. Open Outlook for Windows (Classic Version)
     Go to File > Options > Advanced.
  2. Check the “Show Apps in Outlook” Setting
     Locate the Show Apps in Outlookcheckbox.
    • If enabled:
       Navigate to:
%userprofile%\AppData\Local\Microsoft\Outlook\HubAppFileCache
Delete all files in this folder.

    • If disabled:
       Navigate to:
%localappdata%\Microsoft\Office\16.0\Wef
Delete all files in this folder.

  1. Show Apps in Outlook option enabled in Outlook for Windows.

  2. Restart Outlook
     After clearing the cache, restart Outlook.
Final Step: Verify the ExSign Add-in
Once Outlook restarts, check whether the ExSign add-in is working correctly and signatures are applied as expected.

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Article ID: 3473, , Modified: 5/15/2025 at 6:54 AM

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