Say you started playing on your father's Xbox 360 when you were about 9 years old. Obviously a 9 year old wouldn't have their own Xbox live account, so they used said father's account every time they played. Over time, you played more and more games, eventually accruing your own data record associated with the account. When you turned 11, your father stopped playing altogether, and you've been playing Xbox ever since. Now imagine you're 19 years old and have over a decade of data from constant hours- days- even weeks of playing certain games. None of it belongs to your father except for the account itself.
Now here's the question/s. Theoretically, would it be possible in any way shape or form- along with added consent from the father himself- to transfer all the Xbox Live data, current Xbox Live funds, and all associated downloads from one account (the father's) to a brand new Microsoft/Xbox Live account? Is the only way to accomplish this through changing the father's Microsoft account's email and password? Should I attempt contacting Microsoft themselves for a request this huge or would Xbox Support be able to help me?