Get the certificate from the URL and import it in Mendix.
There is not a certificate attached to the url; I solved this temporarly by removing the policies from the wsdl. We could also change the security policy at the backend, but that is not preferred.
It seems to be a problem in Mendix because it works without any certificates from soapUI and SOAPsonar.
SOAPUI ignores missing or incorrect certificates on a SSL connection.
Ok, is there a way to do that in Mendix as well or should we arrange a certificate? At this moment we are testing with the global ES Workplace of SAP as the web service provider, not with the real backend systems.
You should use a certificate also see https://world.mendix.com/display/refguide3/Project+Settings