Play together on 2 consoles?

We have a second console to buy Xbox so I and my family can play games online together. My question is now, do all games have to be bought twice or can I transfer them to the other console? All our games are digitally purchased. Is it possible to play the same game on two consoles at the same time?

Buy 2 games

Of course you can't play with 2 different consoles at the same time with the same account.

Otherwise everyone would do that with friends and save money.

And with another account?

Then you do not have the games from the other account