That task is for rotating the internal certs that are used to authenticate the WebUI by the RootServer. You should not need to use it unless you suspect your WebUI box has been compromised.
For SSL certs, as long as the server name is still the same (i.e. you’re using a DNS name to access the WebUI), then you can just move the certs to the same location on remote WebUI machine. Details about that location and cert file names are discussed here.