A document has been created to help customers determine SQL Server 2012 core licensing requirements for their deployed SQL Server databases, specifically at the time of their Software Assurance renewal. It provides guidance to help customers inventory SQL Server instances within their organizations and determine the associated SQL Server license requirements, which are needed when renewing existing processor licenses into SQL Server 2012 core licenses. This document should be used in conjunction with the SQL Server 2012 Licensing Guide, which can be found here: http://go.microsoft.com/fwlink/?LinkId=230678
This document provides guidance on building a SQL Server 2012 Transition Report, which offers an easy way to view and understand licensing requirements. Microsoft recommends using the Microsoft Assessment and Planning (MAP) Toolkit to help gather the server inventory data for your report.
View the document at http://download.microsoft.com/download/F/F/2/FF29F6CC-9C5E-4E6D-85C6-F8078B014E9F/Determining_SQL_Server_2012_Core_Licensing_Requirements_at_SA_Renewal_Apr2012.pdf.