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outlookvstonetoffice

Outlook AddIn - change the GlobalAppointmentId

Is there a way to change the GlobalAppointmentId of an appointment.

I found this property schema:

var globalIdPropertySchema = @"http://schemas.microsoft.com/mapi/id/{6ED8DA90-450B-101B-98DA-00AA003F1305}/00030102";

and I set a new value to it:

Item.PropertyAccessor.SetProperty(globalIdPropertySchema, MY_NEW_ID);

then when I get it using Item.PropertyAccessor.GetProperty I'm getting the new id, but the Item.GlobalAppointmentId is still the original one.

I'm needing this so that my addin can sync appointments using ICS files, our system sends ICS files with a suffix in the iCalendar UID field. But it's possible to create appointments for our system through the Outlook AddIn, then the ICS file which is send uses the GlobalAppointmentID as the UID field in the ICS file. We store it, but it needs to have our suffix. Any tips?

Solution

  • You will need to completely release the appointment to make sure Outlook reloads it next time.

    Do you see the change after you restart Outlook?