Meetings involving users with ODM Domain Coexistence enabled and external users experience unexpected results (4348315)

Meetings involving users with On Demand Migration (ODM) Domain Coexistence (address rewriting) enabled and external users experience unexpected results.

For example:

An internal meeting organizer, with address rewriting enabled, who invites an external user may receive a "Tentative" response back, regardless of how the external recipient responded.

An external meeting organizer that invites a user with address rewriting enabled may receive an acceptance response with a "not supported calendar message.ics" attachment.