The User Interface Integration (UII) Deployment Guide for Microsoft Dynamics CRM 2013 and Microsoft Dynamics CRM Online Fall '13 provides an overview of how UII should be deployed in a development environment. In addition, it covers UII administration and the software and hardware requirements of UII.
The UII solution framework uses Microsoft Dynamics CRM business software for the delivery of composite user interface (UI) applications. It includes development and run-time components. Applications built with UII can provide unified access to customer information across different systems and can aggregate different modes of customer interactions or channels. UII provides a framework for non-intrusive integration of existing Line of Business (LOB) systems at the UI level.