BizTalk Server is Microsoft's enterprise application integration solution, with built-in support for XML and SOAP. It offers integration with Visual Studio .NET, and provides speed, reliability, and flexibility for standards-based enterprise application integration. In BizTalk architecture, we have XML messages that are moving. The files come in through Receive Ports and are passed to the "Message Box" through a "Receive Pipeline". They are then picked up by "BizTalk Orchestrations" and are processed.