Okay, a user on my forum registered through Facebook. When you register through facebook, it doesn't ask you for an email or a password. The email it uses is the one linked to your facebook, and you don't have a password. However, a specific user registered through facebook; but the email linked through his facebook is no longer active. He can't access it anymore. So now he wants to change his email on his account. In order to change the email, you have to include a password. So now he needs to setup his password. But XenForo is sending his password setup confirmation to a dead email account... so he can't change his password. Cant change his password, cant change his email.