using xbox live account on a friends xbox

Hey there, I Is Hoodini

What email provider did your friend use to create the Xbox Live account? (You can find this out with the @gmail.com, @yahoo.com, etc)

When was the Xbox Live Account created?

If your friend has entered the email address incorrectly when signing into Xbox Live, then all they need to do is enter the correct email address when they sign into their account.

Regards,

If you friend is gamesharing with someone else chances are that the other home account has purchased the game although your friend is able to play the said game. To make sure your friend can check the purchases made through his account:

support.xbox.com/.../check-xbox-live-bill

Hey Hottub Cowboy -

Are there any other Xbox Live accounts on your Xbox One console that may have accidentally been redeemed on? Or is your Xbox Live account on a friend's Xbox One where they may have been accidentally redeemed?

Keep us posted!

I believe you would also need xbox live on the account you are trying to play with him on. For me when I use My account I need xbox live to play crossplay games such as Gears 5 with a friend whos on xbox

Yes, two players can play with one Xbox Live account. You need to have the "Guest" profile enabled, which is on by default from the console. To make this work, simply have your son join an Xbox Live game, turn on the second controller for his friend, and
then have the second controller join the game as listed by the onscreen instructions. It will ask what profile the second player uses, just choose "Guest" and it will allow his friend to play on Xbox Live as well. Malsidius's suggestion will work, but only
if that second profile has Xbox Live, so your son's friend would need to pay for Xbox Live, whereas the "Guest" account uses your son's Xbox Live at no additional fee.