Do not send reply when Changing/Deleting meeting invites

[MAdMoNKEY]

Does anyone know how I can alter/delete a meeting invite in my Zimbra calendar without notifying the original organizer? In Outlook, I was able open the calendar entry, add some notes, hit save, and then when prompted choose not to send an update to the meeting organizer. In Zimbra, I seem forced to always send an email back to the organizer.