exchangewebservices - Exchange 2013 attendee response is always null

Question

We have problem on Exchange 2013, response of attendee for other attendees is not retrieved from Exchange server, via EWS and also in OWA. In Office 365 it works.

Answer 1

Of course - all replies only go to the organizer, the attendees never see the updated responses.

It is a recent Office 365 feature that allows the attendees to see the responses as well. See https://support.microsoft.com/en-us/office/attendees-can-see-others-responses-to-a-meeting-invitation-f51437e5-352c-4223-b7d8-7020cd71f3c8