Adjust list of DNS servers
Computer Configuration > Policies > Centrify Settings > Mac OS X Settings > Network > Legacy location settings > Adjust list of DNS servers
Control the list of DNS servers when performing DNS lookups.
To use this policy, click Enabled, then click Add, type the IP address for a DNS server, then click OK to add the server to the list of DNS servers. Add as many servers as you want in this manner. When you are finished adding the servers, click OK to close the dialog box.
At any time while the policy is enabled, you can select an address in the list and click Edit to change the address, or Remove to remove it as a DNS server.
This policy can take effect dynamically at the next group policy refresh interval without rebooting the computer.