Workaround for the BizTalk 2006/CRM Problem stating "Error in XML document (2, 2)"

After upgrading from BizTalk 2004 to BizTalk 2006, an error occured when receiving an error from the CRM WebService saying that there is an "Error in XML document (2, 2)".

The message received by the orchestration changed, as the namespace was now given (the red part has not been given in BizTalk 2004):

<?xml version="1.0" ?>
<guid xmlns="http://schemas.microsoft.com/crm/2006/WebServices" >E4096CF2-2777-DC11-B068-001A4BAF607E</guid>

And, the namespace http://schemas.microsoft.com/crm/2006/WebServices indeed does not have a root name entry for "guid" (as you can see in the Administration Console/Application X/Schema).

I unfortunately don't know the reason for this, but, at least, we found a work around: We wrote a CRM wrapper, that encapsulates the functionality of envocing the CRM Web Service. This wrapper is published as a Web Service that receives exactly the same object BusinessEntity like the CRM Web Service does. Than it invokes the CRM Web Services and returns the GUID. BizTalk than has no problem taking this GUID and work furtheron.