DNS host override only works for one entry
Awhile back I created an entry under DNS Host Override for cams.domain.com and it's worked beautifully since the start. However, a few days ago I created another entry for server.domain.com and it hasn't worked once. I've double and triple checked the IP address, static DHCP map, etc.
It's not a firewall issue as I can get to it using the IP address.
Do you get it resolved if you use dig or nslookup?
With these tools you also can verify which DNS server is requested.
So what do you get back?