Benefit for authentication with Active Directory?

Hello all,

I heard that we can use Solaris to authenticate user with Active Directory. However, I do not see the point why we need to do that?? what's the benefit to authenticate user with Active Directory???

Example,
I have Solaris and I limited only 10 users can access Solaris production system. So, other users than these 10 users will not have any shell or have invalid home path. So, those unauthorize users cannot acces Solaris production system.

As far as I can see, if that user resigned then no one could reuse those user in Solaris anymore since that user is not valid when authenticate at Active Directory.

Can authenticate with Active Directory limit access to ROOT account? or any other topic please?

Solaris LDAP client with OpenLDAP server - Docupedia