Recurring appointment exception gets locked when I set PR_FExceptionalBody property to TRUE

Question

Hi,

We have our Plugin created for outlook which we configure to work for sending and receiving mails/appointments/meetings.

We use MAPI, C++ to achieve this.

The problem arises when I create recurring appointment and create exception to one of the instance. Now if we edit that exception instance and we set PR_Exception property to true for that exception occurrence it displays the body in appointment but it locks the appointment for further editing.

Any help? Any property we might be missing to update or wrongly updated so that appointment is getting locked?