Read how to uninstall Office on a PC or how to uninstall Office on a Mac for additional info.
Check if you have the latest version of Outlook
Note: In the meantime, you can sign in to Office online or Outlook on the web. If you have a different plan type, see this article for help signing in. If you purchased a Microsoft 365 Business Professional plan or greater and can’t sign in to your Outlook desktop app, try the following solutions. I can't sign in to my Outlook desktop app
