How to disable syncing from your website
If your site hosts calendars, then users can export your events via the iCalendar format to their own Yandex.Calendar. After adding events, the Yandex.Calendar robot will begin periodically downloading updates from your website and sync them with the user's Yandex.Calendar.
The Yandex.Calendar robot ignores the rules included in the
robots.txt file for undefined search engine robots (
User-agent: *). If you want to restrict access to your website for the Yandex.Calendar robot, then add this special rule to
User-agent: YandexCalendar Disallow: /*.ics$
After doing so, there will no longer be any syncing of your own calendar events with Yandex.Calendar users.
Read more about
robots.txt and features of using individual Yandex robots in the Using robots.txt help section.