Max backup speed for internet connection - when does it take effect after set?

I just started testing UrBackup with few clients. While client’s files are backing up, I’ve set the “Max backup speed for internet connection”, but client’s xfer speed has not dropped. Does the change not take effect on clients already xmitting? Will the UrBackup server service has to be restarted?

I don’t know if the setting takes effect immediately or not, but I went ahead and restarted the service.