If you have C4DtoA 2.2.1 or later, you can use the C4DtoA licensing tools.
Get the name or IP address of the license server computer.
The license server computer is the computer where the RLM license server is running.On Mac OS remote machines will have .local added to the end so the server name may be LICSERVER.local
Start CINEMA 4D
In CINEMA 4D, click Plugins > C4DtoA > Help > Licensing > Connect to License Server
In the Solid Angle (RLM) text box, type "5053@" and then type the name of your license server computer.
If the license server is on the same computer as CINEMA 4D, use 5053@localhost
Render something (an empty scene is fine for testing).