Add domain to Remote Administration Console

we do have two active directory domains that are connected with a forrest trust. But the ERAC always shows only one domain. One time I succeded that it showed the other domain instead of the default one, but dont know how I did this. How can I add the scond domain

 

I have the exact same setup as you, two domains with a trust. Both domains however show up on mine. I didn't do anything special for them to both show up.

There is a setting at the bottom of that screen that let's you switch between "Enumerate on Server" and "Enumerate on Console". Have you tried changing that setting and seeing what happens?