The Calendar Server administrator is a specific user name with its associated password that can manage Calendar Server. For example, a Calendar Server administrator can start and stop Calendar Server services, add and delete users, create and delete calendars, and so on. This user has administrator privileges for Calendar Server but not necessarily for the directory server.
The default user ID for the Calendar Server administrator is calmaster, but you can specify a different user during Calendar Server configuration, if you prefer. After installation you can also specify a different user in the service.admin.calmaster.userid parameter in the ics.conf file.
The user ID you specify for the Calendar Server administrator must be a valid user account in your directory server. If the Calendar Server administrator user account does not exist in the directory server during configuration, the configuration program can create it for you.
See the Sun Java System Calendar Server 6.3 Administration Guide for the complete list of Calendar Server administrator configuration parameters in the ics.conf file.