Today the BizTalk Adapter Development team announced a new whitepaper on troubleshooting the BizTalk Server Soap adapter in BizTalk 2006 and BizTalk 2006 R2 (although a lot of if not all still applies to BizTalk 2004). The download link is here.
The whitepaper goes over the basics of the Soap adapter, several troubleshooting steps, throttling settings, exposing an orchestration as a web service, certificates, consuming web services, tracing tools and more.
I wish they would have added some examples of the tracing tools being used in different scenarios as a lot of companies struggle a bit with them, but the whitepaper is a great resource for those still using the Soap adapter!
Thiago Almeida