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 ...

This post will help you if you cannot add a second Contact address for another domain to an Office 365 Shared mailbox.

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.