Thanks Shilpa,
I checked the article as you have mentioned but it is about the integration with the BizTalk server. I am not currently using BizTalk server and I want to use the Oulook object to create the appointment entries for different people.
What I am trying to accomplish as a part of meeting management system is to send the meeting invites to people selected from the drop down list with proper date, time and location specified. I have implemented the email notification to the people but would like to create a calendar entry for these people in their outlook.