Microsoft Dynamics CRM 2013 User Interface Integration package is now available on MSDN download center.
MicrosoftDynamicsCRM2013UII.exe is available as a separate download from the SDK download page. It contains User Interface Integration (UII) solution framework, which includes a deployment guide, development guide and api reference. UII uses Microsoft Dynamics CRM for the delivery of configuration data for the Integrated Agent Desktop. 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.
User Interface Integration (UII) for Microsoft Dynamics CRM uses the features of Dynamics CRM to deliver composite applications that share a common user interface. UII includes development and run-time components. Applications built with UII can provide unified access to customer information spread across different systems, and can aggregate different modes of customer interactions or channels. Unlike expensive, rip and replace approaches or risky investments on custom development, UII provides non-intrusive integration with existing systems.