I hope this article can help you understand when you need to create a middleware between CRM system and a Legacy system/or custom application.The below example talks about the “contact” entity where the web service accepts the “lastname” attribute of it and inserts the same into CRM system. The end result is the guid which is retrieved and confirms the successful execution of the operation. Before we get started, here’s the list of requirements Microsoft Visual Studio 2010 MS .NET Framework 4.0 MS CRM SDK 2011 ...

This article was originally published on Microsoft Learn (foremerly known as Microsoft MSDN) Read the original article here.