game pass game needs ubisoft connection

you need to install the Ubisoft connect app and make sure your Ubisoft account is linked to your Microsoft account. Both EA and Ubisoft handle their PC game pass games through their own launchers

Steep is on game pass, and is available to play on the cloud. You will still need to connect to Ubisoft to play the game.

Off the top of my head, Ubisoft + allows you to play games on Xbox without a pass if I remember rightly, Ubisoft connect allows you to connect accounts over devices, but you need a game pass to play the games.

May be wrong but that's what I remember hearing.

Hi and thanks for reaching Microsoft Xbox gamer's community. My name is Josef.
I'm an Independent Advisor and a Microsoft Xbox user like you.

Hope you're doing great today despite this James

Please answer the following questions to assist you properly
Is this happening on Windows 10 or 11?
What happens exactly when you try to sign in the Microsoft store with your account?
Are you receiving an error message? If yes, which one?
And tell me briefly what did you tried so far to fix this
In that way I can advise you different things or how to proceed

In order to access EA or Ubisoft games on Game Pass you must download EA play or UbiSoft connect. They manage their own games on PC. You must connect your accounts to those developers so that they will know that you have access to these games through Game Pass