Signing in on multiple Xbox consoles at the same time

You can only sign in to one Xbox One or one Xbox 360 console at a time. If you try to sign in on a second console, you'll be asked whether you want to sign out from the first console. If you respond yes, your account will be immediately signed out of the first Xbox One console.

You can be signed in to one Xbox One console and one Xbox 360 console at the same time. There are some apps that you can't use on different consoles at the same time. For example, Groove Music can only be used on one console at a time.