BindingProvider является решением.
QName qname2 = new QName("http://myschema", "MYserviceImpl");
Service service = MYserviceImpl.create(new URL("https://mysiteRequest"), qname2);
MYservice reply= service.getPort(MYservice.class);
BindingProvider bindingProvider = (BindingProvider)reply;
bindingProvider.getRequestContext().put(
BindingProvider.ENDPOINT_ADDRESS_PROPERTY,
"https://mysite");
MyResponse response= reply.myRequest(request2);