The below links contain all relevant information for Symantec Endpoint Encryption 11 for System Requirements, Installation, and Management.
Symantec Endpoint Encryption 11 Release Notes
Symantec Endpoint Encryption Management Server, Version 11.0 System Requirements
Symantec Endpoint Encryption Management Server Console, Version 11.0 System Requirements
Symantec Endpoint Encryption Client, Version 11.0 System Requirements
Symantec Endpoint Encryption 11 Drive Encryption Getting Started Guide
Symantec Endpoint Encryption 11 Removable Media Encryption Quick Start Guide
Symantec Endpoint Encryption 11 Installation Guide
Symantec Endpoint Encryption 11 Upgrade Guide
Symantec Endpoint Encryption 11 Policy Guide
Symantec Endpoint Encryption Drive Encryption 11 Administrator Command Line Guide
Integrating Symantec Endpoint Encryption 11 with Symantec Data Loss Prevention
For existing Symantec Drive Encryption users new to Symantec Endpoint Encryption 11 that wish to stay and continue using Symantec Drive Encryption 10.3.x please see the below links for information pertaining to installation and setup.
Symantec Encryption Desktop 10.3.2 and Symantec Encryption Management Server 3.3.2 Documentation