My old email account (apple) was deactivated because I do not own an apple device and they would not allow a person to authenticate (require two factor) without an apple device on the account.
Anyway, my teamview account had my apple email and one day teamviewer required two factor authentication also. Because I didn't have the email address as of a day before, I could not log in to teamviewer anymore. Password recovery doesnt work for the same reason. I called support and emailed.
My teamviewer email is [email and password removed by Moderator]
My intent was to try to get TWO companies to purchase teamviewer, but after this we have found a better solution. I am NOT impressed with teamviewer's marketing stratagies.