We have a bunch of RedHat Enterprise Linux servers, and Windows workstations hooked up to Active Directory.
I was wondering how to setup RedHat so it would use ActiveDirectory to authenticate SSH user logins.
I'm a fan of Likewise Open because of easy AD integration, but you can configure this directly.
The problem with your answer moshen is that it doesn't actually provide any information as to how to use these tools to do the configuration.
A link to walkthrough would have been more helpful to the original requestor. A link like http://blog.wains.be/2011/04/11/authenticate-linux-red-hat-with-microsoft-active-directory/ for example.