Creating Custom Active Directory Attributes

Hi,

1 x windows 2012 r2 domain controllers (soone to be upgraded) and 2 x 2012 domain controllers

I would like to add 6 custom attributes to both computer objects and user objects.

I have never done this before, is there some dependencies when it comes to this ? guess i could follow this link, or does someone have a more microsoft spesific link ? http://fkazi.blogspot.com/2013/04/creating-custom-active-directory_27.html

/Regards Andreas