Does having a game disk in XboxX allow me to play the digital version on XboxS on my home...

Yes, unless you wanted to compile disc games, you can rather go for digital.

Thanks, I thought that might be the case.

I've just got use to playing the same game on both the Xbox series X+S through gamepass as I can't always use the main TV. I'll make sure if I want to buy a game I go digital for the flexibility

Cheers

Steve

You can stream the game using using disc versions through your home network.

no. I believe you still need to get the digital version of the game if you're referring to Xbox series S or all digital Xbox one S

Thanks for the replies. I will only every have 2 consoles, one for me and one for my kids. The three of us will never play online at the same time.

I finally got it figured out after a conversation with a Gamestop employee. The Microsoft Xbox support person was totally wrong but what both were missing were the disk vs. digital versions of the game. If I had bought the game digitally, I would have
been set. But I bought the disk version of the game, with digital codes for the DLC. So what I was able to do is buy a used copy of the game and since all the digital stuff transfers no problem, both my son and I are able to play online together at the same
time.

The other thing that is key is what you mentioned, the account that bought the game CANNOT be the "home xbox". So he logs into the home xbox and I log into the other. The home xbox has the family share so everyone on it gets my games and my live membership.
At the same time, the games tied to me follow me to whatever xbox I log on to as well as the live membership.

TLDR version

disk games require 2 discs but anything digital (DLCs) will transfer (I bought a $10 used vanilla destiny disk and all my DLCs work on both xboxs)

digital games you can just download.

live membership can be shared if the live owner is logged onto the NON-HOME xbox but that account exists on the HOME xbox. Kids use the HOME xbox.