SharePoint calling 3rd party SOAP – An existing connection was forcibly closed by the remote host

INTRODUCTION I have a custom ASMX deployed to SharePoint, within that ASMX was a code to call an another SOAP service (written in PHP). On my mockup ASP.NET website all works well. As soon as I transferred the code to SharePoint, I get this error even though I’ve tried to add the SSL certificate of […]