(adsbygoogle = window.adsbygoogle || []).push({}); Now my friend made a xbox live gamertag on my xbox. They have a xbox but can their gamertag be on my xbox and theirs at the same time? Or will I need to get a memory unit? because he wants to be able to play on mine when hes here and play online with me when hes home.

all he has to do is recover it on his xbox.

Yea, just recover it on his Xbox. When I tried to sign in when I recovered it on my cousin's Xbox, it said "Your membership info is not valid. Use a profile with a vaild membership." Something like that.