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.
 Caution –
Caution – 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.