Is it possible to install and execute Dynamics AX V4 on server 2012 ?
My database is a SQL Server 2008 R2 installed on a server 2008 R2, my AOS is running on Server 2008 R2.
thanks
Per the documentation (which I can hardly find anymore), it needs Server 2003, but installing an AOS is pretty easy, you could try it and see how it behaves.
Microsoft often has a move-forward attitude. So when Server 2012 (Sept 2012) came out, AX 2012 was already out (Sept 2011), so it's unlikely they went back 2 versions for compatibility testing.
If you're on 4.0 you should consider upgrading though as it reached its end of life 10/11/2016. See end of life here: Dynamics AX V4 compatibility