We have a SOAP webservice which accepts SOAP message with attachment.

I tried using Endpoint Webservice  service object and smart objects. It works perfectly fine with inout output objects.

but i could not find an option to add attachment to SOAP webservice call.

Any pointers please.

Attaching the wsdl for reference, this service doent work as it is deplyed in internal server, but it gives an idea about the webservice structure