我正在VB .NET中编写同步服务，以将其他用户的日历同步到用户的邮箱中。虽然绑定到约会更新它，我遇到了一个问题，基本上我得到一条消息，建议访问被拒绝？虽然我可以阅读我正在更新的日历，但我可以在同一个日历中创建新条目。如果有人能够建议出现问题以及如何解决它，我会感激不尽，因为我在编写代码的方法上使用了MSDN注释，因为我正确绑定了它：
DestExchServer.ImpersonatedUserId = New ImpersonatedUserId(ConnectingIdType.PrincipalName, sDestinationUser)
sCurrentID = nlTempNode("id").InnerText
' **The error happens on the line below:**
appAppointment = Appointment.Bind(DestExchServer, New ItemId(sCurrentID))**
' Update the event bound to
appAppointment.Subject = nlTempNode("subject").InnerText
appAppointment.Location = nlTempNode("location").InnerText
appAppointment.Start = nlTempNode("startDateTime").InnerText
appAppointment.End = nlTempNode("endDateTime").InnerText
appAppointment.IsAllDayEvent = nlTempNode("allDayEvent").InnerText
appAppointment.Body = nlTempNode("body").InnerText
appAppointment.Sensitivity = nlTempNode("sensitivty").InnerText
appAppointment.Importance = nlTempNode("importance").InnerText
appAppointment.Update(ConflictResolutionMode.AlwaysOverwrite)
appAppointment = Nothing