Two xboxes same account can’t play at same time?

Maybe same account isn’t the right way to put it. My daughter has different Xbox account but is under my live account as a family member. It keeps saying one game at a time but some people are saying it works fine for them?

It is true. You can't sign in and play using the same account on 2 different consoles at the same time. You would have to create a separate account.

That’s outrageous. How do I create a separate account for a pre existing account ie my daughters account . Do I have to start from scratch for her?

if she has her own account that she signs in with i.e different email then thats ok, make her xbox your home xbox and she can then use any games you own and gamepass games and gold.

as she is under your family and has her own account then she can sign in with her own email and password.

create a child account, make her xbox your home xbox and any games you own and gold she can use too.