ThreeHaddock62 said:The only one that wont work is one of your XB1's, the dummy account will only play on your "Home" system, For you to play on another system you have to be logged in on your main account.
You can run 3 systems with your setup however (360x2, Xb1 x1)
This is all true. Though he will need two Gold subscriptions.
Main account has Gold and plays on 360 (B)
Dummy account has Gold and plays on 360 (A)
Second dummy account has Silver and plays on his main's "home" Xbox One, via Gold sharing