[E2010][EWSMA][C#]: Updating Meeting request, Meeting response and Meeting cancellation is failed

Hi Friends,

I have application to update the message attachment. But, while updating the message of type Meeting request, response and cancellation the API Update() gives exception as "The meeting request has already been sent and might not be updated." me problem occurs for Room/Resource mailboxes.

Please tell me how to solve this problem.

Thanks & Regards,

Sunil Pagare.