Can you go to the Contact Us page and send us an email with this information? It will be easier to ask you for information and things like that when we aren't posting in a public forum
To answer the question in general, it's tricky for us to go to an account and see what the email address of the Microsoft Account (as we call it these days) is. We intentionally store that data in a way that protects your privacy but also makes it tricky to reverse engineer like that. There are things we can do, however, but they require more info from you hence the request for an email.