I've got a couple Server 2008 R2 boxes that are doing DNS resolution, and I'm finding that a specific URL is not resolving through either one of them. I can use nslookup from both to connect to the authoritative name servers and request the records manually, but the DNS services can't resolve the addresses. Any ideas on how I could troubleshoot that?
verify that the fowarders and root hints are configured properly. Since you can connect from the server to the authoritative NS it means that the DNS server is not querying properly recursively. See How DNS query works