Hi,
I have a Domain server which takes a very long time while connecting to RDP using the domain users however for local admin it get connected within few minutes. There is another server connecting to same domain where do not see this issue. I checked the DC connectivity using the portquery tool however did not find any issue with it. All the necessary port for LDAP,GC etc have been opened between source and destination. PLease advice if there is anything else that needs to be checked.