Organiser did not receive meeting notification response email
 

I had a exchange 2003 with SP2 on windows 2003 domain. Suddenly all my user
having problem when scheduling appoinment using outlook 2003 calendar. The
problem is meeting organiser schedule a appoinment using calendar and invite
few users, those attendees receive the invite email and click accept the
meeting, however the meeting organiser did not received meeting notification
response mail from attendees even click accept.

Does this problem related to free/busy system folder? How to I troubleshoot
this problem and solve it?

Please help.