2.2.175 [RFC6047] Section 4.4 Multiple Similar Components
The specification provides a sample message to show how multiple iCalendar components of the same type can be included in the iCalendar object when the METHOD is the same for each component.
Microsoft Office Outlook 2007, Microsoft Outlook 2010, Microsoft Outlook 2013, Microsoft Outlook 2016, Microsoft Outlook 2019
It is assumed this section is about iMIP messages with the following structure:
text/calendar (with multiple VEVENT components)
Outlook does not export multiple VEVENT components in an iMIP message, and does not export the PUBLISH method in iMIP messages.
On import, all but the first VEVENT are ignored. Furthermore, Outlook does not recognize PUBLISH as an iMIP method or "attachment" as a valid iMIP Content-Disposition. This MIME part would be imported as an attachment.