Here is an overview of the DLP Incident Persister service stages.
Resolution
IDC files (incidents) arrive at Enforce via the Symantec DLP Detection Server Controller service, are written to the C:\ProgramData\Symantec\DataLossPrevention\ServerPlatformCommon\<ver>\incidents directory, get picked up by the Symantec DLP Persister service and go through the following 3 stages while being processed:
Persistence IncidentPersisterThread persists incidents to the Incident/Message tables.
Processing
Associates Network Prevent incidents to DataUser records where
Users have been imported from LDAP.
The Domain Controller Agent has been implemented
Associates Discover incidents to Discover Walk records.