Symantec DLP endpoints are not monitoring or reporting actions over Remote Desktop Protocol (RDP).
Application monitoring needs to be configured.
On the Symantec DLP Enforce console, configure the following:
Navigate to System > Agent > Global Application Monitoring
Add another Application Monitoring rule by repeating the process above but instead specifying the rdpclip app: rdpclip\.exe
Example of a completed form can be found below. Your Application Monitoring Configuration may be different based on your needs.
To ensure the Endpoint Agent has the latest configuration, reboot the Endpoint to force a check-in with the Endpoint Server. If the Endpoint machine is off-network, connect to VPN first to download the latest config before performing any testing.