nslookup showing - *** Can't Find server name for address <Our Perfered DNS Address> Non Existent Domain

Hi, I'm having an issue where nslookup isn't working on a machine in our domain. However nslookup on other servers and desktops works fine. Basically we have another 2 domains, each with conditional forwards to the other domains dns servers. From the machine in question say in domain A I can ping machines in domain B no problem. However I recieve the non-existent domain when i try and nslookup a machine in domain B, it works fine if I nslookup the fqdn. I have checked the suffixes and they are fine as I can ping machine in domain B without the fqdn. Hope this makes sense!

Many thanks, Dylan
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Amit BhatnagarTechnology Consultant - SecurityCommented:
Have you provided the necessary Suffix Search List order on the "Machine in question"? Also, can you be more specific with your question with a lil' better example...It will help us answer the question more quickly.

What I get is..The machine cannot resolve names in Domain B but it is fine when using FQDN? Please confirm !

MourantSDAuthor Commented:
Hi Amit. I had added the dns suffixes. When I ping globaldc01, I get a reply from dns with the fqdn globaldc01.global.ifsmifa.com, but when I nslookup globaldc01, that's when I see the non-existent domain error. I hope this clears things up a bit.

thanks, Dylan.
Amit BhatnagarTechnology Consultant - SecurityCommented:
How many DNS Servers does the client has in its TCP\IP properties? If multiple, then do you get the same response if you use the same DNS ServerS with NSLookup?
Ideally, the behaviour should be same for Ping and NSlookup. It should automatically append its own domain name name with the flat name or the Suffix Search List, if provided. Suffix Search List will override the Default Domain Name.
Can you take a small network trace when you are trying to do the NSlookup and upload the capture here? I know this is too much work but it will tell us exactly what is happening on the wire. If Yes, then please make sure to clear the DNS Cache (IPConfig /Flushdns) before taking the trace.

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Amit BhatnagarTechnology Consultant - SecurityCommented:
what happened finally? :) What was the solution?
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