Detection Server showing ‘Unknown Status’ after performing a fresh install. Communication is working between the Enforce and Detection Servers.
On the affected detection server check for the file called
\SymantecDLP\Protect\keystoreThis file is necessary for communication.
C:\ProgramData\Symantec\Data Loss Prevention\Detection Server\<version>\keystore
If the file is not present then copy the same from another working detection server and paste it to the affected detection server. Take a backup before you make any changes.
Restart the Vontu Monitor service (or SymantecDLPDetectionService on 15.1 and later)
Note: Ensure to take proper backup of appropriate folders related to keystore before performing any troubleshooting to avoid Data loss.