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Q. How can I specify a forwarding condition for a DNS domain?

A. To specify conditional forwarding for a DNS domain, perform these steps:

  1. Log on as a domain administrator on each DNS server for which you want to add conditional forwarding.
  2. Start the Microsoft Management Console (MMC) DNS snap-in (Start, Programs, Administrative Tools, DNS).
  3. Right-click the DNS server and select Properties.
  4. Select the Forwarders tab.
  5. Click the New button in the DNS domain section.
  6. Enter the name of the DNS domain to which the forwarding will apply--for example, click OK.
  7. Enter the IP addresses of the DNS servers in the forwarded DNS domain by typing the addresses one at a time in the Add field and clicking Add. You should add multiple entries for the DNS servers that service the zone for which you're forwarding. After you finish entering addresses, click OK.

After you've enabled conditional DNS forwarding, you should test whether it's working by performing a DNS resolution request for hosts that are in the DNS domains for which you've configured conditional forwarding. For example, to perform a test, you can use the Nslookup command to query DNS for records that would be serviced in the forwarded DNS domain.

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