You can start all the components together or a single component separately.
Use the imadmin command with the start option to start the Instant Messaging Server, multiplexor, Calendar agent, cluster agent, and watchdog depending on which components are enabled.
At the command line, type the following:
If both server and multiplexor are enabled, this command first starts the Instant Messaging server, and then starts the multiplexor.
If the watchdog is enabled (default), this command starts the watchdog, then the watchdog reads the configuration file and starts the Instant Messaging Server and/or multiplexor as necessary.