Find Xbox user ID

There are only 2 IDs on an Xbox (far as I know):

Gamertag

Email Address

The email should be listed directly under you gamertag on the console

Hi Flashlightly! My name is Ricardo an independent advisor ready to help you with this situation!

To access your Xbox account and other Microsoft services, you need to know the email address and password you used to set up your Microsoft account. Xbox Support can’t provide this information, even if you know your gamertag.

You can find a forgotten Microsoft account email address by using your Xbox console or several alternative methods. Note that the methods for finding adult and child accounts differ, so go to the section below that matches the type of account you need to find.

https://support.xbox.com/en-US/help/account-pro...

Hello Andy Hobi,

Thank you for posting here on the Xbox forums. Unfortunately, there is no way to find a users gamertag using their MSA email. This is most likely for security reasons. If you would like to submit feedback or an idea for possible consideration for a future
update, check out the Xbox ideas drive.

Thanks again.

That's the issue, we do not have the user's Username and I do not believe my friend wants to have him banned. All we would like to find is the person's Username from their MSA id, since that is the only information we have about them.

I would report the Malicious user through
Microsoft's report system. They can ban the user and investigate thoroughly for you.

I hope this helps