Where to set 2006 Delivery Notification property?

I’m looking at the \”Delivery Notification\” sample from
this page:
http://msdn.microsoft.com/biztalk/downloads/samples/

The doc says:
[quote:e0eff02d8a]The sample orchestration has a scope in which messages are sent through a logical send port whose Delivery Notification property is set to Transmitted. If message delivery through this send port fails, the orchestration raises a DeliveryFailureException, and the exception handler of the scope catches the exception. [/quote:e0eff02d8a]

I’m having trouble finding where they set this \”Delivery Notification\” property. I’ve looked on the port configuration in the orchestration, in the assignment shape, and in the physical port.

Thanks