As of version 5.1.11 when specifying a connection string to workspace and specifiying the model name there is no Microsoft login pop-up.
Until this version the default behaviour was to open a window to have credentials passed. Right now it uses the Microsoft Entra ID profile of the current user logged in to Windows (to my best knowledge).
Tested on 5.1.7, works like a charm.
Tried repair on 5.1.11, didn't work.