CP
The error "Microsoft Account does not exist" usually means:
The person is logging in using an Alias. If the user renamed the affected email address into a new account, the original account will become an Alias. Thus logging in using the original account (Alias) will trigger the system to prompt the user that
it does not exist. The solution is to log in using the new account.
The person mistyped the email address. Retyped the correct email address.
The person did not access the account (WITH A BROWSER) within 270 days. The account will be deleted permanently in the system due to inactivity. You may recreate the account as a new account if it
is still available but the data is gone.
Have you tried creating a new account with the same email address?