eConnect provides a BizTalk application integration component (AIC) that you can install on your BizTalk server. The BizTalk adapter allows you to use BizTalk to manage interaction with eConnect business objects.
The adapter supports the use of eConnect as a part of a BizTalk orchestration or in a simple pass-through situation. A BizTalk orchestration allows applications with differing message formats to integrate, while a BizTalk pass-through simply routes messages between applications.
The choice between using a BizTalk Orchestration or a pass-through depends on the level of flexibility your solution requires. An orchestration provides the greatest flexibility. For example, you can customize the adapter by adding bindings to other applications.
Refer the BizTalk documentation for information about developing a BizTalk-based integration.