Hello, thank you for reaching out to Microsoft Q&A.
May I please know when was the last time you were able to sign in with your @hotmail.com account successfully, which is associated with TikTok?
According to the Microsoft account activity policy, if you haven't signed in with your account for more than 2 years, your account will be put into an inactive state and will be closed.
Once the account is closed, it is deleted forever. You cannot create another Microsoft account with the same email address. Microsoft no longer allows deprecated email addresses to be recreated.
In this situation, I recommend getting in touch with TikTok Support to see if they offer any account recovery options that could help you regain access to your business account.