The topics in this section describe how Microsoft BizTalk Server 2006 interoperates with BizTalk Server 2002 and BizTalk Server 2004.
You may want to upgrade your BizTalk Server 2002 or BizTalk Server 2004 installation to BizTalk Server 2006, but maintain trading with partners who continue to use BizTalk Server 2002 or BizTalk Server 2004. This interoperability is supported for various messaging scenarios and transport protocols, as well as for standard BizTalk Server features, such as reliable messaging, security, and BizTalk Server Web services.