Change the default configuration in Sakai 11.0 so that the option to allow site maintainers to subscribe to external calendars is always shown. This property is called 'calendar.external.subscriptions.enable' and should default to true.
This will allow the display of external calendars inside a Sakai Calendar including calendars containing term dates, however, there are a number of restrictions on what the external calendars may contain. The limitations:
- doesn't support full event days;
- doesn't support events not defined with <VEVENT>;
- doesn't support re-occurring events;
- doesn't support events without end time