Assistance ldap kerberos auth against AD 2008 centos 5.8

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http://www.linuxquestions.org – Hello, I hope you are all well. I am in need of assistance, I have been trying to get our Centos 5.8 servers to authenticate against Active Directory 2008 servers. I have no control over the AD server, just a bunch of linux servers running Centos5.8. Previously ldap was setup and authenticating to the AD server with no tls certificate. Recently the AD people have started moving people away from our current domain to a new domain. And for the life of me I cannot get the servers to authenticate against the new domain. i am not using windbind or samba for authentication. If someone can have (HowTos)