Once you have the latest version of Outlook installed, sign in using the email address and password associated with your Microsoft 365 Business Premium plan. 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 Premium 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
