Q:

How is a BizTalk orchestration activated when it is not invoked by other orchestrations and has no inbound ports? 

I need to review several BizTalk applications in the organization.  I have found several enlisted orchestrations that apparently have no entry points and have no idea on how they operate, or how they are activated.  

A:

In the absence of Ports:

The Orchestration is Call'ed or Start'ed using the Call Orchestration Shape or Start Orchestration Shape.   In that case, the called Orchestration has Parameters instead of an Activate Receive Shape. 
The Orchestration contains Types only and does not perform any actual work.   There would be no Shapes in this

