SCCM 2012 R2 SP1 & Windows 10 compatibility

We're unable to deploy patches to Windows 10 Surface Pro tablets using SCCM. I've been advised that our version of SCCM doesn't support Windows 10.

We're using SCCM 2012 R2 SP1 v 5.00.8239.1000 

Is this definitely the case that it is unsupported?

Cheers

Baronne