The following is a list of features and functionalities in Windows Server® 2012 R2 Preview that have either been removed from the product in the current release or are planned for potential removal in subsequent releases (“deprecated”). It is intended for IT professionals who are updating operating systems in a commercial environment. This list is subject to change in subsequent releases and may not include every deprecated feature or functionality. For more details about a particular feature or functionality and its replacement, see the documentation for that feature.
For your quick reference, following table briefly summarizes the status of features that have been removed or deprecated in either Windows Server® 2012 or Windows Server 2012 R2 Preview. This table is necessarily abbreviated; if you see a feature marked for deprecation or removal, please consult the detailed information in this topic or in Features Removed or Deprecated in Windows Server 2012.
Full article here: http://technet.microsoft.com/en-us/library/dn303411.aspx