Enter new license number and validation code and choose [Add new and co-terminate with…] or [Add new with new validity period].
The license file will be sent to you every time you add a license. Save the license file (.lic) you received the last in the same directory where the license manager module(rlm or rlm.exe) is. If you do not know which license file you should use, please read here.
Open the RLM web interface. Click [Reread/Restart Servers] – [Reread/Restart].