series x and s accounts. Need help from Microsoft or anyone else how to solve this issue.

Hello Rhmd, to do this, you need to set the Series S as the home Xbox, then make sure both your account with the games on the Series X, and his account are both signed in on the Series S. Once you do that he will have access to all of the games on the
Series X from his Series S.

Yes, but does a game released on series x/s 'HAVE' to be 'optimized' if not how else would I know its the series x/s version I'm playing?

According to DICE, Battlefield 2042 supports crossplay between two different sets of platforms. Players on Xbox Series X, Xbox Series S, PS5 and PC make up one group, while the second group is composed of Xbox One and PS4 players. Players in the first group can play with anyone else in the first group, but not the second group. The reverse holds true for anyone in the second group, as they are free to play with anyone else in the second group but not in the first group.

if you have series x/s then you need to add the other player within game as you will need to be friends on origin, so you need to know his origin tag to add him within game.

if you are on xbox one or ps4 then your out of luck.

A Series S is technically different hardware. I haven't seen anyone with a Series S post this issue. They all seem to have a Series X.

WHich console are you having issues with? Serie X/S or One? I ask in case there are different problem solving for the different consoles..may help someone with the tech knowledge