AppointmentItem.ResponseStatus (Outlook)

Returns an OlResponseStatus constant indicating the overall status of the meeting for the current user for the appointment. Possible return values are olResponseAccepted - Meeting accepted, olResponseDeclined - Meeting declined, olResponseNone - The appointment is a simple appointment and does not require a response, olResponseNotResponded - Recipient has not responded, olResponseOrganized - The AppointmentItem is on the Organizer's calendar or the recipient is the Organizer of the meeting, olResponseTentative - Meeting tentatively accepted.

Dim orssResponseStatus As OlResponseStatus
orssResponseStatus = Session.CreateSharingItem.Move.Items(1).ResponseStatus