I don't know if this is related to match-making, but my friend and I cannot join each other's sessions so we can play together in a party. Other multiplayer has worked for me in the past (once); I don't play multiplayer very often. But when he bought his Xbox One with Halo, we wanted to match up together... and failed. Does anyone know if this is a known problem and if it is being worked on? Is this even match-making related at all?