2.2.124 [RFC5546] Section 3.4.1 PUBLISH

V0252:

The specification describes the use of PUBLISH with VTODO components.

Microsoft Exchange Server 2007, Microsoft Exchange Server 2010, Microsoft Exchange Server 2013, Microsoft Exchange Server 2016, Microsoft Exchange Server 2019

Microsoft Exchange Server does not export VTODO components. Microsoft Exchange ignores VTODO components on import. For PUBLISH-type iCalendars objects, this is imported as an empty calendar.