Select "Use the following DNS server addresses", and enter the IP address of the local DNS server (*) as the Preferred DNS server:
Finally click the "OK" button in this and the previous dialogs to save your changes.
(*) The DNS server IP address must match an IP address that Simple DNS Plus is configured to listen on in the Options dialog / DNS / Inbound Requests section.
If you are configuring the computer which Simple DNS Plus is running on, you can use 127.0.0.1 (the "localhost" address) - otherwise you must use an IP address which is accessible over the local area network.
NOTE: We also recommend disabling the "DNS Client" service
For more information, please see the following knowledge base articles:
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