This article hosts the guide for Data Loss Prevention by Symantec and the PGP Encryption Server.
See attached document for the full Integration Guide.
Symantec Data Loss Prevention Encryption Insight Implementation Guide
213405 - Flex Response Plug-in for Symantec Endpoint Encryption Removable Media Encryption
226470 - Symantec File Share Encryption with DLP and the flex response plug-in
406073 - PGP Encryption Server and Symantec Data Loss Prevention Integration Guide
160675 - DLP Agent Flex Response Plug-in Install and Configuration