How to set up Calendars in iCal

Run the Apple iCal/Calendar application
	In the menu, select iCal/Calendar → Preferences
go to tab Accounts Click on the + button to create a new account
	Choose Add CalDav Account...
Choose Account Type: Manual Type your User Name, Password and Server Address [domain.tld]
	Next step you need Verify Certificate in Safari browser Open Safari and type your Choose Show Certificate
Choose domain.tld Certificate Authority Choose Trust
	Choose Always trust