Hi CFS Alain,
Good day! Thank you for posting to Microsoft Community. We are happy to assist you.
Based on your description, you want to clear cache in outlook, since you mentioned that you aim is not to clean auto complete cache, did you mean that you want to remove Outlook temp cache files?
If yes, please see information below:
- If the Outlook app is open on your computer, you need to close it before you can delete the cache. Save any work you may be doing in it and quit the app.
- Press the Windows + R keys at the same time to open the Run box. Type the following path into the box and press Enter.
%localappdata%\Microsoft\Outlook - It’ll open a folder containing your Outlook profile and cache files. You want to find the folder that says RoamCache and double-click on it to open it.
- All the files that you currently see on your screen are the Outlook cache files. To get rid of these files, select them all by pressing Ctrl + A on your keyboard, right-click on any one file, and select the Delete option.
- You may want to clear your Recycle Bin to ensure the files are gone for good.
I hope the information above can be useful. If there is any update or I misunderstand you, please feel free to let me know. I will continue to assist you. Your understanding and co-operation are highly appreciated.
Thanks for your precious time. Have a nice day!
Sincerely,
Sherry | Microsoft Community Moderator