Hi Zimbra Team
I hope these items are under your To-do list too..
1. drag and drop for appointment items in the calendar
2. Can you keep relationship between mail and appointment when the appt. is created from the mail. This is one of the missing functionality in most of the collaboration tools.
3. In meeting schedule click to add name is not working..it should able to pull out names from the contact list.
4. Can I tag an item as a task - thus creating a task/ appointment ?
Hope to get a response from Zimbra team.