How can I track who does what (makes changes) in the Calendar?

[camarilf]

I have several people updating a calendar and was wondering if there is a way
to track who makes what changes to the calendar.

 

[Diane Poremsky]

Changes, no; add new appointments, yes, look at the owner field.

 

[Tony G]

Where is this owner field I can't find anything.
Running Outlook '03 and '07
Thank you