If you are working with a Rights Management system, you must set up and register the rights management server. You must also install the needed version of the Active Directory Rights Management Services Client for Trellix DLP Discover to be able to apply Rights Management encryption to files.
Set up the Rights Management server and register it with Trellix ePolicy Orchestrator - On-premises.
For Trellix DLP Endpoint only, install Active Directory Rights Management Services Client 2.1 build 1.0.2004.0 on each endpoint using RM services.