Sun Java System Communications Express provides an integrated web-based communications and collaboration client. Communications Express is a common part of Messaging Server and Calendar Server, providing end users with a web interface to their calendar information and mail, as well as an address book.
Communications Express consists of three client modules: Calendar, Address Book, and Mail. The Calendar and Address Book client modules are deployed as a single application on a web container. Messenger Express is the standalone web-based mail application that uses the HTTP service of the Messaging Server. Messenger Express should be deployed on the same system as Communications Express.
Communications Express depends upon the following Sun Java System component products:
Access Manager (If you are using Sun Java System LDAP Schema Version 2)
Web Server/Application Server (for web container)
Communications Express Mail includes the security advantages of the Secure/Multipurpose Internet Mail Extension (S/MIME). Communications Express Mail users who are set up to use S/MIME can exchange signed or encrypted messages with other Communications Express Mail users, and with users of the Microsoft Outlook mail system.