As an alternative you could use our product, Exchange GroupCalendar. A
server add-on that mirrors personal calendar info in real time to the
public folder calendar while writing the initials in front of the
subject.
It allows for rules to define exactly what kind of items (only of a
certain category or with a certain keyword) go into the public
calendar(s).

On 24 jan, 16:34, Cindy H. Cindy
wrote:
InOutlook2003 at the clients, we have apubliccalendarset up on the
exchange server with Author permission granted to a few users. How can I
find out who entered what item in thepubliccalendar?