Outlook: Determining When Appointments Were Made

I'm trying to determine when a particular Outlook calendar entry was made. I know that I can view the Modified date on an appointment's Properties dialog box, but how can I find out when an appointment first appeared?

You must switch to a table view, such as Active Appointments. Right-click the column headings and choose Field Chooser. From the Date/Time fields list, drag the Created field to the column headings to add that property to the view.