Software & Apps MS Office How to Clear the Outlook Cache Delete Microsoft Outlook's cached data by Heinz Tschabitscher Writer A former freelance contributor who has reviewed hundreds of email programs and services since 1997. our editorial process Heinz Tschabitscher Updated on September 29, 2020 reviewed by Jon Fisher Lifewire Tech Review Board Member Jonathan Fisher is a CompTIA certified technologist with more than 6 years' experience writing for publications like TechNorms and Help Desk Geek. our review board Article reviewed on Apr 04, 2020 Jon Fisher MS Office Outlook Word Excel Powerpoint Tweet Share Email What to Know Seeing removed Outlook items? This happens when add-ins are removed/reinstalled, contacts are deleted, or software is reinstalled.In the Run dialog box, enter %localappdata%\Microsoft\Outlook and press Enter. View and delete files in the RoamCache folder. This article explains how to delete the cache and how to clear the auto-complete cache. Delete the Outlook Cache Removing the cache in Outlook doesn't delete emails, contacts, or other useful information. Outlook automatically makes new cache files when you open it. Instructions in this article apply to Outlook 2019, 2016, 2013, 2010 and Outlook for Microsoft 365. Save any work and close Outlook. Press Windows key+R. In the Run dialog box, enter %localappdata%\Microsoft\Outlook and press Enter. Double-click the RoamCache folder to view the cache files. Back up the cache files to another folder or external hard drive so that you can restore the files if something goes wrong. To delete the cache files, press and hold the Shift key while selecting all of the files. Then press the Delete key, or right-click the highlighted files and select Delete. If you're prompted to confirm the deletion, press Yes. Clear Auto-Complete Cache If you only want to clear the auto-complete cache, either turn off auto-complete so the cached data doesn't display or delete the auto-complete cache completely. Go to the File tab and choose Options. In the Outlook Options dialog box, select the Mail tab. To turn off autocomplete, go to the Send messages section. Uncheck the box next to Use Auto-Complete List to suggest names when typing in the To, Cc, and Bcc lines. If you want to clear the auto-complete cache without disabling the feature, select Empty Auto-Complete List. In the confirmation dialog box, select Yes. In the Outlook Options dialog box, select OK.