That would be your default Calendar folder, either in a mailbox or a PST
file. If it's your own default folder you certainly should have permissions
on it. You can check on the permissions by selecting Folder List for the
Navigation Pane display and right-clicking on the Calendar folder and
selecting Properties. Go to the Permissions tab and see what permissions
your logon has.

Does this happen with all appointment items or only some? The only times
I've seen that sort of error message was if the user didn't have rights to
edit items in the folder.

Can you modify items in that folder manually, using the user interface?

--
Ken Slovak
[MVP - Outlook]
http://www.slovaktech.com
Author: Absolute Beginner's Guide to Microsoft Office Outlook 2003
Reminder Manager, Extended Reminders, Attachment Options
http://www.slovaktech.com/products.htm


"OctopusThu" wrote in message
...
My Outlook was not of an English version, but the exception should be
meaning:
"You do not have the authority(privilege) to move(modify) the item."

The MAPIFolder was the default folder acquired by:

Outlook.MAPIFolder defaultFolder =
applicationObject.GetNamespace("MAPI").GetDefaultF older(Outlook.OlDefaultFolders.olFolderCalendar);

So I think it should be a public one.

By the way, I can create new AppointmentItem in this folder with:

item = (Outlook.AppointmentItem)
defaultFolder.Items.Add(Outlook.OlItemType.olAppoi ntmentItem);