How does Outlook send Task Requests?

Question

I have been working with EWS and have frequently come across posts for Assign Task or Task Request creation is not supported by EWS.
But we can create Task Requests from Outlook. How does Outlook do that? What API does it use in the back to achieve this?
Is there a way to use the same API that Outlook uses to achieve this functionality?

Answer 1

Outlook use MAPI to access and create Items in Exchange Store so if you use the Outlook Object Model
http://msdn.microsoft.com/en-us/library/office/ff184639.aspx or a Third Party Library like Redemption
http://www.dimastr.com/redemption/RDOTaskItem.htm these both use MAPI and will allow you to assign a task programmatically. The Raw rops that the Mapi client does to do this are also documented
in the following protocol document
http://msdn.microsoft.com/en-us/library/cc463886(v=exchg.80).aspx .
Cheers
Glen