Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Hello,
May I please know the exact error message you receive during sign-in?
https://account.microsoft.com/
Do you get the 'This Microsoft account doesn't exist. Enter a different account' error?
If so, may I know when you were last able to sign in to your Microsoft account successfully?
Note -
According to the Microsoft account activity policy, if you haven't signed in with your Microsoft account for more than 2 years, your account will be put into an inactive state and will be closed. You cannot even use the Account recovery form to recover your account.