Where are the IIS and HTTPERR log files?

You can often diagnose HTTP adapter issues by using the IIS and HTTPERR log files supplied by the IIS server. By default, the IIS log files can be found in %WinDir%\system32\LogFiles\W3SVC1\ and the HTTPERR log files can be found in %WinDir%\system32\LogFiles\HTTPERR.

Note

The HTTPERR log file can only be found on a Windows Server 2003-based computer.

Source: Microsoft

HTTP Adapter

The HTTP adapter is used to exchange information between Microsoft BizTalk Server and an application by means of the HTTP protocol. The HTTP adapter consists of two adapters—a receive adapter and a send adapter. The HTTP receive adapter is a Microsoft Internet Information Services (IIS) Internet Server Application Programming Interface (ISAPI) extension that the IIS process hosts, and it controls the receive locations that use the HTTP adapter. The HTTP send adapter controls the send ports that use the HTTP adapter.

Source: Microsoft

Base EDI Adapter

The Microsoft Base EDI adapter provides comprehensive electronic data interchange (EDI) messaging functionality to complement the XML messaging capabilities of BizTalk Server 2006.

Source: Microsoft