Hello I trade my account and he let me change everything the email and password but it go...

Hi,

maybe now you understand a bit better why trading accounts is strictly prohibited and a violation of the ToS.

The only thing you have left is the experience that such rules are good for something !

They didn't do any of what you just said. Instead they did what I posted. He didn't change my WLID to his. Instead he just associated his with mine, so when I changed my password, he can reset it back via his email. That's why I removed him from my account
so he couldn't access my email anymore. But there is one thing I can think he can do, is via the customer support. Since he knows my previous password, and last 4 digit of CC, he might still be able to get back in, despite me changing my password and blocking
everything. I'm going to call Microsoft as this might be a serious security flaw on their part.

When I it the save and exit button it will tell me to enter a password but that's not a problem the email is not the one on my account and it will not let me change it. Is there a way to change the email?

Does he know the password for the Microsoft Account?

If he does you should still be able to change the email used to sign into the account by going to

account.live.com/addassocid and adding an alias/email to the account and making that new email the primary email and then he would be able to remove the old email.

If he has the password but when going to that site and it wants to verify the ownership of the account by sending an email with a code to the old email address (what microsoft calls a security proof) he would be able to change the security proof but it will
lock him out of the account for 30 days while the security proof change takes affect. Once the security proof change takes affect he would be able to change the email associated with the account.

He changed everything even email and password