Author: Ann Slyshkina. Users of Bitrix24 may connect the service’s calendars to their Apple device (Mac OS X, iPad, iPhone) and implement two-way sync. That is, when events in the Bitrix24 calendar ... ... device, click Settings and select Mail, Contacts, Calendars>Accounts.
Click Add Account.
Select Other > Add CalDAV Account.
Specify your Bitrix24 address as server (<your_domain>.bitrix24.com). Use your login and password....