I can understand why you cannot use the local system in the scan targets,
considering the fact that the enforce server is not a file repository, it is unlikely you would like to scan the server.
Moreover,
If you would like to upload an IDM/EDM profile to the server you can use a local directory, which suggests that the possibility that you would have confidential data on the enforce server is pretty high, and scanning the enforce server would not be relevant.
If you would like to scan the enforce server and the server is windows (not linux) what you can do is to install a DLP agent on the server and run an Endpoint Discover scan on the server
Kind Regards,
Naor Penso