Using Classic Outlook on Windows for personal email, calendar, and contact management
Hi,
I completely understand how confusing and concerning this situation is, especially when you’re certain the email is correct.
To be honest, I would rather choose to give you correct information than give false hope.
Based on the error messages you’re seeing, it’s possible that your Microsoft Outlook (Hotmail) account may have been compromised and the primary email (alias) was changed or removed. This can result in the “email does not exist” message, while still showing “email already in use” when trying to recreate it.
If your account has been hacked, please use the sign-in helper tool in the link below to guide you to the appropriate solutions. The link provides comprehensive steps to help you recover a hacked account and also gives you the option to chat with Microsoft Support as a last resort.
https://go.microsoft.com/fwlink/?linkid=2196140
Also, please fill out the account recovery form: https://account.live.com/acsr
Microsoft takes account security seriously, so the recovery process is fully automated to prevent unauthorized access. Complete the form using a device and location you’ve used before and provide an accessible email address.
Microsoft usually reviews requests within 24 hours. If approved, you’ll receive instructions to recover your account.
You can submit the form up to twice within a 24-hour period and add any new details you remember.
If none of the steps work, I’m sorry to say that since the username has already been changed to a different one, it means the account has been taken over by the hacker. There is no way to recover it, and it is now unfortunately lost.