Home xbox and ultimate

they have ultimate, they had core, then switched to ultimate later that day, and do we need to be each others home xbox for me to get xbox live then??? as in thier account on mine and my account as their home xbox

You would have to set one of the consoles as your Home console and your wife and children can access the Ultimate on that console. You can sign in and use the Ultimate subscription on the non-Home console. https://support.xbox.com/games/game-setup/my-home-xbox

Xbox Game Pass Ultimate works in up to two locations

a) The declared Home machine of the Game Pass Ultimate owner

b) Whichever machine the Game Pass Ultimate owner is currently logged into

In the case of b) , the Game Pass Ultimate does not need to be the active user. You could have two users logged in and while the owner is logged in, the other user on that non-Home machine will be able to play as well (or instead as long as the owner remains
logged in - active or inactive)

So you could give the Game Pass Ultimate to one son but get him to declare the other son's machine as his home machine.

There are gotchas

- the non "Home" machine must always be internet connected. No internet, no Game Pass Ultimate. The Home machine will always work regardless (but may need internet from time to time for confirmation)

- be careful with changing Home machine too often - there is a limit on how many times you can declare a machine as "Home" - 5 changes per year at the moment.

Xbox 360 and Xbox 1 (and PC) are treated separately ; so you could set up 2 x Xbox1 and 2 x Xbox 360 using the one Game Pass Ultimate account with one Xbox 1 and one Xbox 360 each declared as "Home".

A user can only be logged in to one Xbox 1 AND one XBox 360 (and PC as well) at the same time

I hope this helps.. For myself, we have an Xbox 1 X , an Xbox 1, and an Xbox 360 all with a single Xbox Game Pass Ultimate account. All can be used at the same time as long as I am logged onto the XBox 1 X (which is NOT declared as a "Home" machine and I
am the Pass owner)

I hope that this helps you

I'm having a problem where one account has Ultimate, the Xbox is set to home, yet no other account is able to use the functions of Ultimate.

My girlfriend had recently got game pass ultimate and we said we would gameshare it. Her home xbox is my xbox and my accounts home xbox is on her console. The subscription is only showing up on her xbox and is not transferring to mine also how do i fix this?

Gamesharing through the "Home" feature does not share the Ultimate subscription. "Home" console lets you play any of her purchased and downloaded games even if they are from Game Pass. Your account will not show as having Ultimate, and your account will not be able to utilize Game Pass PC or cloud gaming. Those features are only for the account that actually purchased Game Pass Ultimate.