Update Status In Data Base (SQL Server) While Accept the Appointment

Dear All,

I have to do functionality like Any user will Accept the Appointment then status will be updated in database table(SQL Server 2008).

I have to do this functionality using Exchange Server 2007 SP1 and  EWS.

How can i achieve this functionality ? How can i fire Accept event for User who get the Email for Meeting or other event ?  

Kindly Reply.

Thanks and Regards,

Hardik Ramwani