Bad request = Validation error

Continuation from previous post.

Solving permission problem I still had "Bad Request", but now the inner exception (and the Event Log) got me a validation error.

My WCF DataContract had a Required=True on a property that did not exist on the incoming message from BizTalk.

HTTP Bad Request can certainly mean a lot of things. Be sure to look in every log.

I recommend to config BizTalk, and the WCF service, to trace WCF-traffic. Use the WCF Config tool and the WCF Trace tool. They are located under "C:\Program Files\Microsoft SDKs\Windows\v6.0\Bin" and called "SvcConfigEditor.exe" and "SvcTraceViewer.exe"