There was a pretty similar post a few days ago where I posted some suggestions to start with if you want to check it out and reply back:
Assuming the connector configuration isn't the issue, the first thing you'll want to make sure of is the logs have the data. The majority of the DNS connectors pull from the Event Logs so there's no real LEM-based configuration there and the other is a file path. If there is data in the logs I have a follow up suggestion, but it would require additional configuration on the client machines.