Synchronizing is easy and doable with only a few clicks.
Click on the calendar feed button on the dashboard and select if you want to sync your own or everyone's accepted requests.
By clicking on the more button you have additional options what to sync. For example birthdays, work anniversaries.
When synchronizing leave schedule, only confirmed requests are shown in external calendar. Requests that are entered but not confirmed yet, can only be seen when logging in to Somno.