https://community.safe.com/integration-8/soapaction-where-do-i-have-to-add-it-and-how-in-httpcaller-transformer-3235
SoapAction: Where do I have to add it and how in HTTPCaller transformer | Community
In SOAPui, I have this SOAPAction in the xml editor: SOAPAction: "http://schema.bpost.be/services/common/address/ExternalMailingAddressProofingCS/v...