We have an environment like 1 root domain with 1 additional domain controller in windows server 2008 r2 and 1 child domain controller with 3 additional domain controller of which 2 domain controller run in Windows server 2003, 1 domain controller run in Windows server 2008 and 1 run in Windows Server 2008 R2. In client end we use the Windows Server 2008 and Windows Server 2008 R2 additional child domain controllers address as DNS address.
The issue is when any policy change in Windows Server 2008 additional child domain controller group policy it is not replicated to others. But if any group policy change in Windows Server 2008 R2 additional child domain controller it replicate all child domain controllers except Windows Server 2008 additional child domain controller. And there is no error in event log.
Mithun Dey Web: http://cloudmithun.wordpress.com