1.9. Flexible authentication back-end

Makes it easier to centralize logins and passwords, and to integrate with your organization's existing systems.

Your organization may already have systems in place that lets people log in. You really don't want to give them another set of passwords to keep track of — which is why Plone ships with a flexible authentication back-end.

By default, Plone support its own authentication system and the OpenID standard, and integrates with LDAP and Active Directory servers via freely available plug-ins.