The port by default is 5264, but you might have used another self defined port to enter there. The IP address should be the IP of the computer the MLS is installed to.Add the command g_licenseServerUrl=' address]:' into this new line.Please add an additional command to this file, assigning the license server automatically starting the program. Inside Cinema 4Ds installation folder you find the subdirectory 'resource' including a file named 'config.txt'. This might be a problem for administrators, which have to handle the license servers login on many computers.
This means, there is no 'license.ini' existing anymore, which automatically connects to the MLS, without the user having to do something. With Cinema 4D R21 a new licensing system has been introduced, which is used for the new Maxon License Server(MLS) as well.