Updated Appointment via EWS shows UTC instead of local TZ - exchangewebservices

Question

I have researched for this issue and am unable to find a solution.
The SO post TimeZone change to UTC while updating the Appointment referred to the same problem, but I've tested the solution and its not working.
Here is what's wrong:
Does anyone have a solution? The time is correctly reflected on Outlook, Emails etc. It's just that the text shown is misleading to people and causing confusion.
*Note that the code below can be copied and pasted into a console app for testing.
var timezone = TimeZoneInfo.FindSystemTimeZoneById("Tokyo Standard Time");
var service = new ExchangeService(ExchangeVersion.Exchange2013, timezone);
service.Credentials = new NetworkCredential("myemail#mydomain.com", "mypassword");
service.Url = new Uri("https://outlook.office365.com/Ews/Exchange.asmx");
var meeting1 = new Appointment(service);
meeting1.Subject = "Test Meeting";
meeting1.Body = "Test body";
meeting1.Start = new DateTime(2013, 8, 22, 9, 0, 0); //my default time is GMT+8
meeting1.End = meeting1.Start.AddHours(2);
meeting1.Location = "Conf Room";
meeting1.RequiredAttendees.Add("someone#outlook.com");
meeting1.Save(SendInvitationsMode.SendToAllAndSaveCopy);
Console.WriteLine("1st invite sent");
var id = meeting1.Id.ToString();
System.Threading.Thread.Sleep(5000); //break for a while...
//re-fetch the appointment
var meeting2 = Appointment.Bind(service, new ItemId(id),
new PropertySet(BasePropertySet.IdOnly, AppointmentSchema.Start,
AppointmentSchema.End, AppointmentSchema.StartTimeZone,
AppointmentSchema.EndTimeZone, AppointmentSchema.TimeZone));
Console.WriteLine( meeting2.StartTimeZone ); //shows Tokyo Standard Time correctly.
meeting2.StartTimeZone = TimeZoneInfo.FindSystemTimeZoneById("Tokyo Standard Time");
meeting2.EndTimeZone = TimeZoneInfo.FindSystemTimeZoneById("Tokyo Standard Time");
meeting2.Start = new DateTime(2013,8,23, 9,0,0, DateTimeKind.Unspecified);
meeting2.End = meeting2.Start.AddHours(2);
meeting2.Subject = "Updated Test Meeting";
meeting2.Update(ConflictResolutionMode.AlwaysOverwrite, SendInvitationsOrCancellationsMode.SendToAllAndSaveCopy);
meeting2.Load(new PropertySet(BasePropertySet.IdOnly, AppointmentSchema.Start,
AppointmentSchema.End, AppointmentSchema.StartTimeZone,
AppointmentSchema.EndTimeZone, AppointmentSchema.TimeZone,
AppointmentSchema.Body, AppointmentSchema.NormalizedBody,AppointmentSchema.TextBody));
Console.WriteLine( meeting2.StartTimeZone ); //shows Tokyo Standard Time correctly.

Answer 1

I've been having the same issue as we're using ExchangeVersion.Exchange2010_SP2 but i'm managed to get round this using:
appointment.Save(SendInvitationsMode.SendToNone);
// to fix the issue of updating appointment sets timezone to UTC, we use ExchangeVersion.Exchange2007_SP1
service = new ExchangeService(ExchangeVersion.Exchange2007_SP1);
service.UseDefaultCredentials = false;
service.Credentials = new WebCredentials(Account, Password);
service.Url = new Uri(url);
service.Timeout = 600000;