Symantec Data Loss Prevention (DLP) Enforce
In the Enforce console go to "System > Incident Deleter > Delete Incidents".
Open the "Next scheduled deletion time" window.
Select "No Regular Schedule".
Click Submit.
After the Enforce services are recycled or the server is rebooted, the schedule defaults to the daily schedule.
DLP 15.x
Working as designed.
An Enhancement Request (ER) has been submitted to Product Management to change this functionality.
There is no guarantee this ER will be added to the product.