Procedure for Conditional Forwording

1. Open the DNS mmc
2. Right click on the DNS server name and click properties
3. Click on the Forwarders tab
4. Click new button
5. Enter the DNS zone name, Example abc.com, or cde.corp
6. In the field "Selected Domain's forwarder IP Address list" enter the IP address of the DNS
7. The above DNS IP is the IP address of the DNS server that hosts the zone, abc.com..
8. Click add ... you can add more than one DNS servers IPs
9. Click apply and then OK