Developed by Apple Computer, Apple iCal is an application allowing management of calendars on Mac OS X. The application enables to view events of multiple calendars in a single schedule and thus quickly identify conflicts in the time schedule.

Calendars may be either stored on the disk or it is possible to subscribe for calendars stored at the web server. It is also possible to publish calendars on the web server.

MailServer supports publishing of calendars in user email accounts on the server and subscription of calendars stored in the mailbox from the Apple iCal. In addition to subscription to their own calendars, users can also subscribe to calendars shared by other users.

Warning: In Apple iCal, subscribed calendars are available only in the read-only mode. Published calendars are available on the server for reading only (this implies that it is not edit published calendars when accessed by WebMail, for example).

Notes: If calendars published as subfolders of the default calendar called Calendar, all events will also be displayed in the Free/Busy calendar.