As a customer, you may have recently deployed DLP and is attempting to create a Single-tier Detection Server using localhost, however, it is showing up as 'Unknown'.
Detection Server showing as 'Unknown'.
This can be caused by not installing the DLP Enforce Server as a Single-tier solution. This can be verified by logging into the Enforce Console and checking for the service "SymantecDLPMonitor".
*Note: This is not to be confused with the SymantecDLPMonitorController service. If the SymantecDLPMonitor service is present confirm it is in a 'Running' state.
If the Enforce Server solution was not installed as a Single-tier Monitor it must then be uninstalled and reinstalled as a Single-tier Monitor. Follow these steps: