Dormant @outlook.com emal address

Those two messages do not establish that the old mailbox is archived and recoverable: an address being unavailable during signup is not proof that its former account still exists. First check the exact spelling and domain of the original address, then try any other sign-in alias or phone number previously associated with the account. Use Microsoft's sign-in helper to investigate the account-not-found message rather than repeatedly creating a replacement. Microsoft's activity policy generally requires signing in at least once every two years, although exceptions apply, including certain purchases and active subscriptions. Consequently, inactivity is a possible explanation, not a confirmed diagnosis from these messages alone. If the account was permanently deleted, Microsoft says it cannot be reopened; creating another account would not restore the old mailbox. Keep recovery details private, and use official account support to clarify the status before paying anyone who promises to recover it.