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Thanks for the help. &nbsp;<br />
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I have found the issue. &nbsp;Their DNS forwarders were set to a previous ISP's DNS servers. &nbsp;Once I changed them to the correct servers it works correctly again. &nbsp;<br />
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I found it when I was checking for root hints so I'll give you credit sgupta1181. &nbsp;Thanks
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Thanks for the help.  

I have found the issue.  Their DNS forwarders were set to a previous ISP's DNS servers.  Once I changed them to the correct servers it works correctly again.  

I found it when I was checking for root hints so I'll give you credit sgupta1181.  Thanks

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We have a 2003 Windows server that is acting as pdc, dns &amp;&nbsp;dchp. &nbsp;We haven't changed anything for quite awhile but all of the sudden today nobody can access the internet if the dns is pointing to that server. &nbsp;I didn't have a secondary dns setting but I added the router's local IP as the secondary so that they could have internet access again. &nbsp;I'm pretty sure there must be an issue with the dns but I cannot figure it out. &nbsp;From the server if I have just it's own IP address the only dns server, nslookup will not resolve anything. &nbsp;Should I just rebuild the dns server or is there an easier fix, or something else to look at all together? &nbsp;Like I mentioned earlier, everything was working great for a long time but something just happened out of the blue.<br />
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Thanks.
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We have a 2003 Windows server that is acting as pdc, dns & dchp.  We haven't changed anything for quite awhile but all of the sudden today nobody can access the internet if the dns is pointing to that server.  I didn't have a secondary dns setting but I added the router's local IP as the secondary so that they could have internet access again.  I'm pretty sure there must be an issue with the dns but I cannot figure it out.  From the server if I have just it's own IP address the only dns server, nslookup will not resolve anything.  Should I just rebuild the dns server or is there an easier fix, or something else to look at all together?  Like I mentioned earlier, everything was working great for a long time but something just happened out of the blue.

Thanks.

2003 Windows Server possible DNS issues

Windows Server 2003 was based on Windows XP and was released in four editions: Web, Standard, Enterprise and Datacenter. It also had derivative versions for clusters, storage and Microsoft’s Small Business Server. Important upgrades included integrating Internet Information Services (IIS), improvements to Active Directory (AD) and Group Policy (GP), and the migration to Automated System Recovery (ASR).