title: WSO2 ESB Send mediator with client certificate credentials
body: <p>We have a WCF service under IIS that is protected by Transport security (SSL) with client certificates (not the message WS-Security, but by IIS itself).
  I have added the certificate to wso2carbon.jks
  Whenever Send mediator is executed the request times out. IIS log shows only error 500.0.
  If in IIS configuration I set to ignore client certificates everything works fine.
  Also coded Java Axis2 and .Net clients work fine with turned on certificates on ISS.</p>
  
  <p>Most probably I missed something in the call. Is WS-policy required for such case?
  I would appreciate any help.</p>