If a redundant license file (by default lservrlf) is in the same directory as the license server, when you start the license server it will start up as a redundant license server. If an lservrlf file is not in the same directory as the license server, you can still start it as a redundant license server if you use the license server -rlf option and specify the name and location of the redundant license file.
Note: When using the Sentinel RMS license server and other utilities, you must have administrator privileges on Windows or be logged into the root on UNIX. Also, if you are using network licensing, a supported network protocol is required on the target machine.