The following Calendar Server documents are available online in PDF and HTML formats:
Sun Java Communications Suite 5 Event Notification Service Guide
Sun Java System Communications Services 6 2005Q4 Schema Reference
Sun Java System Communications Services 6 2005Q4 Delegated Administrator Guide
Sun Java System Communications Express 6.3 Administration Guide
Sun Java System Communications Express 6.3 Customization Guide
Sun Java Enterprise System Technical Note: Sun Java System Calendar Frequently Asked Questions
In addition, the graphical user interface, Communications Express, has online help.