This command will send a local System Maintenance NewsFlash Message on the local server. The users will not know the nickname of the sender of this NewsFlash message. You must be a Services Administrator to use this command. All users will see this message regardless of their modes.
/mflash This server is going down for an upgrade in 5 minutes.
Use this whenever you need to send a notice to all local users about maintenance issues. It will appear differently than a normal notice, so that normal users cannot fake network notices.