The following Java Enterprise System components are required for this release of Communications Express:
Directory Server - Install Sun Java TM System Directory Server 6 .
Calendar Server - Install Sun Java System Calendar Server 6.3 .
Web Server - Install Sun Java System Web Server version 7 if you use Web Server as the web container
Messaging Server - Install Sun Java System Messaging Server 6.3 .
Application Server - Install Sun Jàva TM System Application Server 8 if you use Application Server as the web container