Another small problem that I came across recently. A team of 10 people all use a public folder shared calendar to track appointments/commitments. An item was added to the calendar lacking details and no one owned up as being the creator. Unfortunately for them I found a way of identifying who was responsible by looking up who created the calendar item. I did this using the following steps from Microsoft help (KB Article 257492)

1. On the View menu, point to Current View, and then click Active Appointments.

If you are using Outlook 2003, point to Arrange By on the View menu, point to Current View, and then click Active Appointments.
2. Move the mouse pointer to one of the column headings (such as Subject), and then right-click that heading. Click Field Chooser in on the shortcut menu.
3. In the Field Chooser, change from Frequently-used fields to All Appointment fields.
4. Click Organizer, and then drag Organizer to the column heading area. You see red arrows appear that indicate the column heading’s position. Release the mouse button when you have the field where you want it.
5. In the Field Chooser, change from All Appointment fields to Date/Time fields.
6. Click Created, and then drag Created to the column heading area. You see red arrows appear that indicate the column heading’s position. Release the mouse button when you have the field where you want it.
7. Close the Field Chooser, and then expand the columns if needed.