ExternalSystemId not being enforced as a user key in Web Services 2.0 (R17)
On a side note, Id and SR Number are enforced as keys, I can't duplicate them.
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ns="urn:crmondemand/ws/ecbs/servicerequest/10/2004" xmlns:data="urn:/crmondemand/xml/ServiceRequest/Data"
xmlns:wsse="