Add ad module in Windows 2012 R2

Hi,

Please advise howto add a powershell module for AD management in Windows 2012 (powershell x86 as well as x64).

When I try to I get an error:

PS H:\> import-module ActiveDirectory
import-module : The specified module 'ActiveDirectory' was not loaded because no valid module file was found in any module directory.
At line:1 char:1
+ import-module ActiveDirectory

Please advise.
J.

Jan Hoedt