Reset Outlook to Default and Remove All Accounts
Why would I want to reset Outlook?
If you need to wipe all accounts and trigger the new installation prompts, this is the quickest way to do so.
Important: This will remove all accounts and cached mailboxes, so make sure you have done any necessary backups/exports before resetting!
How do I reset Outlook on a Windows PC to start as if it’s a new installation?
1. Open Control Panel (hit the Windows Key on your keyboard and start typing Control Panel to search).