
Step 2: Go to windows file explorer and type the following command: C:UsersUser-NameAppDataLocalMicrosoftOutlook to search for the OST file. Step 1: Exit from the MS Outlook application if it is running. Please remember to mark the replies as answers if they helped. Follow the instructions to delete the OST File from Outlook 2019, 2016, 2013, 2010, 2007, 2003. Thank you for your understanding and support. Manually The manual method for Excel, Word, and PowerPoint is different from Outlook. Select the checkbox Next time Office starts, clear all previously-started web add-ins cache. Note 2: In order to clear other cached lists see the guide: Clear the Most Recently Used lists. From the ribbon of any Office host except Outlook, navigate to File > Options > Trust Center > Trust Center Settings > Trusted Add-in Catalogs. Note 1: If you are not comfortable editing the Registry yourself you can use OutlookTools (free) instead. If you need further assistance regarding PowerShell, I'd recommend you post a new question to the following forum to get more dedicated support: Delete the Value name 101f0445 when Outlook is closed to empty the search cache. If above is not possible, it's recommended to use script to achieve the goal.

If you can force all users to start Outlook using this command, this can bed used to clear Outlook client side autocomplete cache for all users.

To clear autocomplete cache for a end user.

Outlook client and OWA are using different auto-complete cache, we need to clear the cache for both OWA and Outlook client.įrom Outlook client side, we may try to start Outlook using Outlook / CleanAutoCompleteCach e
