In my case, a zone in my secondary DNS server was configured to be a Primary. To fix it, open up DNS, right click on each zone, choose property and double check the type. I changed it to "Secondary", put in the IP of the Primary and the problem was solved.
From a newsgroup post: "In my case, the problem was caused by a bad NIC (the connection was failing intermittently) which kept the ISA server from finding domain controller".
If the suggestion from error description doesn't help, the error may occur because ACS/RSVP Service (Resource Reservation Protocol (RSVP) and Quality of Service (QoS) Admission Control (ACS)) is not working properly. See "Troubleshooting QoS RSVP" link below.
From a newsgroup post: " The error can appear if DNS server is not properly configured. Run a netdiag /v and dcdiag /v to see what the errors are. To configure DNS properly see Microsoft article ME300202