Use the imadmin command with the refresh option to stop and restart an individual Instant Messaging component and refresh that component’s configuration.
You can refresh all the components together or a single component separately.
Whenever you change a configuration parameter in the iim.conf file, you also need to refresh the configuration.
Do not use the imadmin start, imadmin stop, or imadmin refresh commands in an HA environment with Sun Cluster. Instead, use the Sun Cluster administrative utilities.