authenticating against AD - PAM issue?

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http://www.linuxquestions.org – Hi We have a setup on 50+ servers that works fine. I have ducplicated the set up to a number of new servers and "some" of them have big issues authenticating against AD. If I login as a local user, then Code: "su - AD.USER" I can login OK allbeit slow. If I ssh directly from my PC and login as the AD USER, it takes ages and eventually times out. I see this issue: as soon as I hit enter after typing the password this appears in the secure log: Quote: su: pam_unix(su-l:auth): authentication failure; logname=root uid=999 euid=0 tty=pts/0 ruser=LOCA (HowTos)