Perform the following steps from the command line. In these steps, the location of the Messaging Server installation directory is msg-svr-base, and the Messaging Server user is inetuser. Typical values for these variables are /opt/SUNWmsgsr, and mailsrv, respectively.
As mailsrv, run the configutil utility to load the libibiff file.
cd msg-svr-base ./configutil -o "local.store.notifyplugin" -v "msg-svr-base/lib/libibiff"
As root, stop then restart the messaging server.
You are now ready to receive notifications through ENS. See B.2 Running Sample Event Notification Service Programs