How to tell who sent a calendar event?

Version: 2008
Operating System: Mac OS X 10.5 (Leopard)
Processor: intel
Email Client: Exchange

When I receive events (via email), I can tell who sent them. But after I
accept the event and it goes into the calendar, the sender is no longer
listed. How do I tell who sent the event from within the calendar? Is
there a display variable I need to enable?

Thanks,
BG