Edge Transport Server Role Prerequisites Warning:Setup cannot contact the primary DNS server (10.202.100.1) using TCP port 53

Hi All,

I am upgrading Exchange Edge Server from 2007 SP2 to SP3.

I got this warning message on Edge Server.

What checks I did:

1. The DNS Server is pinging

2. Nslook up is giving all the results like Nslookup 127.0.0.1 Server IP gives Localhost....

Is this common on Edge Servers.

Please let me know whether I can procede with the Setup.