2.1.6 [RFC5545] Section 3.8.4.1, ATTENDEE MUST Be Present on Group-Scheduled Calendar Entities

  • Article

The specification states, "This property MUST be specified in an iCalendar object that specifies a group-scheduled calendar entity."

Outlook does not export an ATTENDEE property on meetings in the following scenarios:

  • When exporting a PUBLISH-type draft meeting that the user has not added any attendees to yet.

  • When exporting an exception to an existing recurring meeting in which the attendee list was not modified. For more details, see [RFC5545].