There are two methods for setting the logging level for Symantec Data Loss Prevention (DLP) Network Discover.

To set logging levels for Discover through config file: 

1. Go to the \Program Files\Symantec\DataLossPrevention\DetectionServer\15.X.00000\Protect\config folder. 
2. Add the following lines to the FileReaderLogging.properties file:
   java.util.logging.FileHandler.level = FINEST
   java.util.logging.FileHandler.limit = 10000000
   java.util.logging.FileHandler.count = 16
   com.vontu.filescan.RawFileInductor.level = FINEST
   com.vontu.detection.logging.DetectionLogHandler.level = FINEST
   com.vontu.discover.logging.DiscoverLogHandler.level = FINEST
   com.vontu.discover.logging.DiscoverTraceLogHandler.level = FINEST
   com.vontu.detection.level = FINEST
3. Restart the Discover Server for the settings to take effect.

To set logging levels for Discover through Enforce U/I: 

1. Go to system > servers and detectors > logs and select the configuration tab.
2. Select the discover server and under the diagnostic log setting, choose the option "discover trace logging".
3. Select configure logs and restart the discover server for changes to take effect.