I've been having this ongoing issue that has been plaguing me. I am in charge of two domains:
DOMAIN1 - Functional Level 2003
DOMAIN2 - Functional Level 2012
I was able to establish the trust between the two domains successfully as it is a two-way external non-transitive trust. Since then however, I have been having issues. Attempting to open Active Directory Users & Computers from DOMAIN1 and connect to DOMAIN2, I will get several different error messages such as access denied, RPC Server Unavailable, or that I have reached the timeout period. Performing the same from DOMAIN2 to DOMAIN1 works fine.
I have verified with the firewall team that the ports are open, but when using PortqryUI I have issues when it scans Port 135. It begins listing all of the UUIDs, then stops randomly and doesn't provide anymore information. I'm worried I may have a UUID issue on DOMAIN2 domain controller but am not sure.
Does anyone have any idea what this could be?
Thanks!