We are happy to announce support for SQL Server 2014 running on Microsoft Dynamics AX 2012 R2 Cumulative Update 7 and AX 2012 Cumulative Update 5. This means that all Dynamics AX 2012 versions are now supported with SQL Server 2014.
What about R3, you forgot one :)
...is there a special build needed of R2 or just any CU7+ build?
Wim, R3 supports SQL 2014 by default.
Rene, any CU7 (or later) build is supported for AX 2012 R2.