Using Classic Outlook on Windows for personal email, calendar, and contact management
Hi,
The error message saying 'The account does not exist' usually appears when you enter an incorrect username or email address, the account has been compromised, or you haven’t signed in to your account for more than two years.
- When was the last time you successfully logged in to this account?
- Did you make sure you entered the correct email address?
- Have you noticed any unusual activity on your account recently?
Please note that if your email account ends in @hotmail, @outlook, @live, or @msn and was removed, replaced, or deleted due to inactivity, it cannot be used to create a new account. See "Remove an email address" section here: https://support.microsoft.com/office/add-or-remove-an-email-alias-in-outlook-com-459b1989-356d-40fa-a689-8f285b13f1f2