Sun Microsystems has decided to exclude the communication products from the Sun Java Enterprise System entitlement.
Beginning with the current release 5, communication products will be available as part of the Sun Java Communications Suite; or as individual products. Communication products will no longer be installed through the Java Enterprise System installer.
Communication products affected include:
Sun Java System Messaging Server
Sun Java System Calendar Server
Sun Java System Instant Messaging
This change in entitlement does not affect the previously shipped communication products in Java Enterprise System 2005Q4. If you have communication products installed, no change will occur to your current entitlement.