This specification extends the CALDAV:calendar-query and CALDAV: calendar-multiget REPORTs to return results for calendar object resources in scheduling Inbox collections.
When a CALDAV
calendar-query REPORT includes a time-range query and targets a scheduling Inbox collection, if any calendar object resources contain "VEVENT" calendar components that do not include a "DTSTART" iCalendar property (as allowed by iTIP [RFC5546]) then such components MUST always match the time-range query test.
Note that the CALDAV:free-busy-query REPORT is not supported on scheduling Inbox collections.