Managing personal Outlook.com account settings, security, and privacy
Hello,
This error means Microsoft cannot find an account associated with the email address you entered.
First, please use Microsoft's official sign-in helper:
Enter your Hotmail address and follow the instructions.
If Microsoft still cannot find your account, it may have been deleted due to inactivity, or the email address may have been removed from the account either by you, or others (if the account was compromised).
Microsoft may permanently delete accounts that have not been accessed for more than two years. Once permanently deleted, the account cannot be recovered.
Since you need an OTP from a third-party website, you may also need to contact THAT website's support to recover access using a different verification method.