I have 2 DCs (2008 R2). ( lan network, 192.168.1.0/24) I have also a ISA Server 2006.
On the perimeter network ( 192.168.2.0/24 ) I try to join both a 2008 32bits and a 2008 R2 machine to the domain. The former joins the domain flawlessly, the latter cannot, there is an error message.
The interesting is that if I put the 2008-R2 machine in the same lan as the DCs, the problem disappears, which makes me think of ISA Server.
Does anyone know about any known issues when attaching a 2008 R2 to a domain, through ISA?. I am getting a bit desperate, I have reviewed event viewer, dcdiag, looking on the internet for the same problem, and so forth, no luck so far.