Hi Mohan,
When u click on network/endpoint incidents, u will see associted incident which are default. Also u can create custome reports by filtering with dome parameter like policywise,domainwise,senderwise etc.
after click/see the incidents , u will see export option on upper and middle portion of DLP console. So u can save those reports in csv and xml format.
find the snapshot below for export option.
Please refer below
https://www-secure.symantec.com/connect/forums/dlp-incident-reporting
https://www-secure.symantec.com/connect/forums/maskingredacting-information-dlp-incidents-and-reports