How do I clear my Outlook cache?

Hi @Michael Powell,

Welcome to Microsoft Q&A forum.  

Thank you for reaching out to us. I understand you’re experiencing issues with Outlook opening the online version instead of your local desktop version, and clearing the cache can often help resolve this.

To clear cache in Classic Outlook, please follow these steps:

Close the Outlook app. 

Press the Windows + R keys simultaneously to open the Run dialog box. 

Type the following path into the Run box and press Enter: %localappdata%\Microsoft\Outlook\RoamCache 

This will open the RoamCache folder containing the cache files associated with your Outlook profile. Usually, it's located at: C:\Users{User name}\AppData\Local\Microsoft\Outlook\RoamCache 

Click anywhere within the folder, press Ctrl + A to select all files, and then press the Delete key to remove them. Alternatively, you can right-click the selection and choose the Delete option from the context menu. 

After clearing the cache, restart Outlook again. It will rebuild the necessary cache files from scratch. 

For more detail, please refer to: How to clear Outlook cache in new app and classic version.

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To clear browser cache:

Clearing your browser’s cache and cookies can fix display and syncing issues in Outlook Web. Proceed by clearing cache and cookies from your browser to prevent potential conflicts.    

• Open your browser settings and clear temporary internet files, cookies, and cached images.    
• For accuracy, choose the option to delete cached data for at least the last 7 days.    
• Once cleared, close and reopen the browser fully (do not just refresh).    

I hope this helps you clear Outlook cache quickly. I'm glad to assist and truly hope the information provided has been useful. Please feel free to reach out anytime if you need further assistance.

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To clear your Outlook cache on Windows, you can follow these steps:

Classic Outlook on Windows

1. Delete the contents of the Wef folder:
   Navigate to the following folder and delete its contents:

      %LOCALAPPDATA%\Microsoft\Office\16.0\Wef\
   

2. Delete additional cache (if applicable):
   If your Outlook add-in uses the unified manifest for Microsoft 365, also delete the contents of the following folder:

      %userprofile%\AppData\Local\Packages\Microsoft.Win32WebViewHost_cw5n1h2txyewy\AC\#!123\INetCache\
   

After performing these steps, restart Outlook to see if the issue is resolved.

References:

• Clear the Office cache