Hi
The soap adapter will retrieve the fault message from detail tag.
<soapenv:Fault>
<faultcode>errorcode</faultcode>
<faultstring>message</faultstring>
<detail>
<Attributes>
<field1>value1</field1>
<field2>value2</field2>
<field3>value3</field3>
</Attributes>
</detail>
</soapenv:Fault>
If you want complete soap message then enable Do Not Use SOAP Envelope in the soap receiver channel.
Regards,
Praveen.