Recently i was involved in a project where the Desktop Director server was in Domain A & IT admins/Helpdesk admins were in Domain B. Both domain were in different forest with 2-way trust relationship.
When Domain B users connect to Director, it wouldn’t show the details of the users and session details.
For this to be working, we have to point the active directory domains in IIS director site.
inetmgr>Default Web Site>Director>Application Settings>Connector.ActiveDirectory.Domains remove (user),(server) and add DomainA,DomainB
Hope it helps!