Support for Apple Mail in IMAP accounts allows displaying of all types of email folders created in the user's mailbox. This applies also to all types of public folders. In IMAP accounts in Apple Mail, the following items are displayed:
contacts
calendar
tasks
notes
However, this support is limited by features of the email client. Therefore, all events, contacts, tasks and notes will be displayed only as email messages with an attachment where all data associated with the corresponding event, contact or task will be included. Events and tasks include attachments in the .ics format, contacts include attachments in .vcf.
If you use Apple Mail as an email application, it is possible to simply import each event to Apple iCal (for details, see chapter 10 Apple iCal Support) where it can be viewed in a selected calendar.
Although contacts are saved as .vcf attachments, it is not possible to import them to the Apple Address Book.