I don't know if this is a problem or not so I thought I'd ask the experts.
I have a 3 Domain Controller Active Directory DNS Integrated setup.
The 2 AD Domain controllers holding all the FSMO roles are Windows 2003 Enterprise 32bit ver. The other server is a Windows 2008R2 64bit server. What I am concerned about is that when I open the DNS console in the WIndows 2008R2 server I added both of the Windows 2003 Servers to the DNS tree without any problems. I have 3 AD DNS integrated servers and I have them all visable in the DNS tree on the Windows 2008R2 Server.
But on both of the Windows 2003 servers when I open the DNS console I can see both of the Windows 2003 DNS servers in the tree only. When I try to connect to the WIndows 2008R2 DNS server I get an error popup that says "The Server is Unavailable. Would you like to add it anyway?".
I can ping the Windows 2008R2 server from both Windows 2003 servers as well and it appears that the AD replication is working fine.
Is this a problem or just some behavior related to the different OSs?