We are using a Server 2003 domain. I've found the instructions for installing the Active Directory snapin for Server 2012 and earlier: http://technet.microsoft.com/en-us/library/cc732110.aspx. However the DLL it mentions (schmmgmt.dll) isn't present on our 2012 R2 server.
I've found information on 2012 R2 AD Administration Centre, but as our domain is 2003 based I presume none of that is relevant.
Can I run the AD snap-in on this server, or do I have to use an older server?