Can anything be done to add our domain users to the local Power Users group on every machine by default?Basically, when a domain user logs into a machine, I would like them to be a Power User ...

I've done this in the past but can't figure out what's wrong. I'm creating groups on Domain A for a small team on Domain B, the trusted domain. But when I try to search for the users on Domain B ...

If the Add User or Group button is grayed out in User Rights Assignment on Windows Server, you need to take a look at these things.