An Attempt to resolve the DNS name of a domain controller in the domain being joined has failed? This only happens when trying to get the Windows 7 Pro PC to join the domain. I have no problems adding PC with Windows XP Pro to the Domain on Windows Server 2008 R2...I have turn off all the Firewalls on the PC...I'm used SONIC WALL on the Server. any help would be greatly appreciated. Kenny

Have you verfied the Client's TCP/IP settings? Are they the same (with the exception of the IP address) as the clients that do not have this issue? Your clients need to have their DNS client settings point to the DNS servers that are hosting the AD zone for the domain. Visit: anITKB.com, an IT Knowledge Base.