Microsoft.Exchange.WebServices.Data.Appointment IsOnlineMeeting Set action is invalid for Property

问题

Trying to create a calendar event in exchange using the Microsoft.Exchange.WebServices.Data.Appointment. Everything works fine until I set the IsOnlineMeeting property to True. This results in the error "Set action is invalid for Property".

In the Appointment object this property is marked as "settable". I'm able to set the IsResponseRequested property to true with no issues. Has anyone experienced this issue before with IsOnlineMeeting property?

// Summary:
//     Gets or sets a value indicating whether this is an online meeting.
 public bool IsOnlineMeeting { get; set; }
// Summary:
//     Gets or sets a value indicating whether responses are requested when invitations are sent for this meeting.
public bool IsResponseRequested { get; set; }

来源：https://stackoverflow.com/questions/39254066/microsoft-exchange-webservices-data-appointment-isonlinemeeting-set-action-is-in