Below is a quick and dirty procedure to install and enable ACS Forwarding on a System Center Operations Manager RMS or Management Server.

1. Copy adtagent.exe to C:\windows\system32
2. Run command adtagent -install
3. Edit HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\AdtAgent\Parameters

    a. Ensure/Add DWORD key EventlogLoggingLevel is set to 2
    b. Add DWORD key LocalConfig and set to 2
    c. Add DWORD key NoCache and set to 2
    d. Add Multi-String Value key AdtServers and enter name of the collector to  forward to.

4. In Services CP, set Operations Manager Audit Forwarding Service to Automatic and start.
5. Verify by running SELECT * FROM dbo.dtMachine on the OperationsManagerAC database and finding the management server name. Could also run SELECT * FROM dbo.dtMachine WHERE Description = 'DOMAINNAMEHERE\MACHINENAMEHERE$'