Microsoft Dynamics CRM 2011 provides a very rich application framework that can be easily customized based on our business-specific requirements. By customizing Microsoft CRM 2011, we can change some of its core functionality and add some new functionality to its existing features. Microsoft CRM 2011 can be customized into different levels; it could be a simple UI customization without writing a single line of code or customization that is done by writing some JavaScript code. Most of the Microsoft CRM components can be customized from CRM UI itself.