We are running Active Directory (2008 schema) on a Windows 2003 platform (we are upgrading to 2008 at sompoint) we have installed Novell Zenworks 10.2.1 on number of domain controllers and now they are randomly having issues with RPC communication when replicating the AD.

DNS and DHCP for the network is run via InfoBlox rather than internal DNS and DHCP servers.

Is there any reason why ZEN would be causing RPC to fail. it is only since the system was installed on the domain controllersb that there is the fault. also could be a fault between Zen and Infoblox.

sorry for the lack of information