I have an old hotmail.com account that apparently has my primary domain set up as an alias. I haven't logged into it for years and therefore I've no idea what the answers to all of the questions are in the "recover account" form. I need to remove the alias from it in order to set up my domain with Outlook.com here (https://domains.live.com/)

How the heck do I get it removed if I can't log into it? It's defunct now and the old email should really just be closed off.