I have an XBox One and my son is wanting to buy an Xbox Series X or S; preferably an X but I don't think he will be able to get one before Christmas or early in the new year so he may have to settle for an S.
I have a Xbox Game Pass Ultimate subscription that I purchased on my Microsoft account. Each of my kids have their own login for Xbox. I don't use the Xbox at all so I'm not that familiar with how everything works.
I realise I can set up family sharing so that games I have purchased can be played across both consoles.
Do I have to buy another Game Pass subscription for the new Xbox? If so, I gather I'd have to buy it under one of my son's names. If I can share it, can both XBox's be used at the same time to play the game pass games?
You can, set your son's Xbox as your home console and any account logged into it will share your purchases.