I have transfer case the role to additional server, after the transfer, in turn, execute the command "Netdom server case", "Dsquery server - isGC", "Netdom query PDC", have shown has a case the role, the additional domain but now the problem is, I go to the group policy manager to edit a group policy, tip error dialog box: "can't find the network name," I find the system log can't find relevant error messages, so want to ask you what is the problem?