I see a lot of thread on LDAP Authentication but I want to enable LDAP Authentication with Authorization. Meaning, removing the user ID's and groups from the local servers and move them to an LDAP server. When a user logs in (via LDAP) they will be given their group memberships and access to the system based on these group assignments.
How do I accomplish this?
Depending on your OS, you can find tons of howtos/guides on the web. Maybe check for pam_ldap on your OS or the web.
Take a look at Active Directory Integration Index - blog.scottlowe.org - The weblog of an IT pro specializing in virtualization, storage, and servers for Solaris and Linux LDAP authentication to Windows AD.
You'll need to decide on what kind of LDAP server you want to run - whether you want to authenticate against Windows Active Directory or install any of the many unix based LDAP servers.