Unable to Integrate RHEL 5.X with Microsoft WIndows server 2012 AD.

We are trying to integrate Redhat Linux 5.11 to WIndows 2012 Server AD. We followed the steps in How do I authenticate Red Hat Enterprise Linux 5 against Windows 2008 Active Directory using LDAP and Kerberos? - Red Hat Customer Portal and still it didnt happen. we also tried the steps in :
Authenticate RHEL 5 and 6 SSSD Using Kerberos and LDAP Against Active Directory on Windows Server 2008 R2

steps are available only for Windows 2008, not sure if steps differ for 2012 R2.
Please privude the doc for 2012 R2 if you have any.

We added the role in AD as given in links

Dism.exe /online /enable-feature /featurename:adminui /all to install the administration tools for Identity Management for UNIX.

after making the changes, it is expected to give ad users output for getent passwd command.
but its not. We find that port 749 is not listening in AD server for the RHEL 5.X CLients.

Not working at all. happens all the time.