Used to kick every user out of your room. You must be an AOP or higher in the room to use this command. It will not work if anyone currently in the room outranks you.
/msg chanserv mkick #conferenceroom
This command should not often be needed. But it can reset a room to its default settings by forcing everyone to leave. Every once in a while a room can become desynched, such that services thinks someone is in the room when no one is. Then services do not properly set the topic or modes, because they do not realize they were erased when the room emptied. An mkick will usually fix this.