My brothers account was recently marked for suspicious activity when he changed his email...

I'm having the same problem with my brother's account, we made an email for the account, but he never used it, and I was the only one with the password. Now he tells me JUST recently to change his email account, wish he would have told me sooner.

But anyways, my guess is that we will have to contact support and have them change the email. This probably happens when the email gets deleted for not being in use for so long.

Hey there, so initially, if I get this correct, he had received a notice about suspicious activity and change his password? How did he receive the notice? I ask because I’m more worried that he went to an unofficial email that looked like it was from Microsoft
and it was actually a phisher that got his password and changed his account

This would be something to bring to MS Support.

https://support.microsoft.com/en-us/contactus

As I mentioned above, this really isn't a possibility in my mind - I change my password frequently and have two factor authentication. No suspicious email or other connection activities noted either. My recent games played also did not suggest anyone was
on my account since I used it.

Hi.

My stepson got an xbox for christmas and it was set up by his older brother with his email address and bank card. He then proceeded to spend £300 on his brothers bank card (unsupervised play by his mother!) so he sold his xbox. For his birthday his dad and
myself bought him an xbox and he set up a new gamertag, he still has his old gamer tag with all his other games on it however when trying to access it it asks for a security pin which has been sent to his older brothers email address and we can not get that
code as his older brother wont give him it even when we try to explain we want to get rid of his details so he has no comeback from it, however we did have access to his old gamertag as we removed the credit card that was on it. so my question is how can i
remove the email address for his old account and put mine on it? i have tries to go through xbox assist but still waiting!!

In short that account is his older brothers unless his brother gives the ok to change the email its his microsoft account