We're having an issue with DNS clients not being able to resolve certain FQDNs. Within the same domain in which the problem occurs, doing an nslookup against a host name works. However, an nslookup against the hostname.domain.parentdomain1.parentdomain2.net doesn't work. Weird, from outside that domain, the same FQDN query works. Clients in both domains are using the same DNS servers, which are in the "parentdomain1" example.

The nslookup comes back with:

Non-authoritative answer: Name: hostname.domain.parentdomain1.parentdomain2.net.parentdomain2.net Address: 209.62.20.188

So, the client is appending the "parentdomain2.net" twice.

Would appreciate any assistance.