⟩ What are Host and Host Instance? Did you deploy BizTalk more than one machine?
A BizTalk Server Host is a logical set of zero or more
BizTalk Server run-time processes in which you deploy items
such as adapter handlers, receive locations (including
pipelines), and orchestrations.
A host instance is the process where the message
processing, receiving, and transmitting occurs You install
a host instance on each server running BizTalk Server 2006
that has one or more hosts mapped to that server