[TriLUG] LDAP vs AD vs NT domains vs eDirectory vs RHEL directory server

[Chris Bullock]

We have an old dying NT4 domain that we currently use only for user authentication to gain access to network services.  We are long overdue for an overhaul and I am looking for advice on which direction to go.  As I mentioned before currently we are using the NT4 domain for user and Windows client authentication, our overall goal will be that all mail (postfix,) linux systems and users, and other possible MS apps be able to authenticate against this.
Here are my questions:
1.  What could be a drop in replacement for our current NT4 domain?
2.  What will give us AD type authentication/access and how easy or difficult will it be to set up, ie is there anything as easy as the click and add feature available in AD?




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