Aaron Axelsen

LDAP authentication is configured on a site-wide (as opposed to per-blog) level, so only Network Admin accounts have access to the configuration to LDAP connection information.
Please make sure you have PHP compiled with LDAP support. This will show up as an LDAP section in your phpinfo() if it is correct.
Remember – all the code for the plugin was contributed by volunteers, and you can show your gratitude by giving back to the community!
<h3>How It Works</h3>
When enabled, this plugin can automatically create WordPress user accounts and blogs for LDAP-authenticated users. Assuming user credentials authenticate against the LDAP server, creating local accounts and blogs follows this 
algorithm:
Create a new WPMU User, with LDAP username and a randomly generated password. 
Some user information, such as first and last name, is extracted from the 
 information returned from the LDAP server. 
Actions for user creation and activation are triggered. 
The user’s domain / URL are created depending on plugin configuration (i.e., 
 VHost vs SubDir). 
If the option is set, a blog is created, with path and name based on the LDAP 
 username and the blog is activated with the user being Administrator, and 
 appropriate actions are triggered.
It should be noted that even though a random password is created for a user (for WPMU accounts), it is never displayed to the user. This is intentional so that there is no confusion as to which password should be used; it will always be using LDAP credentials. As a result, though, if ever LDAP is disabled or if the server is unavailable, users created with LDAP authentication will be unable to log in unless their passwords are reset.

WPMU Ldap Authentication

A plugin to override the core WordPress authentication method in order to use a LDAP server for authentication.  Currently only supported on MultiSite …

heiglandreas

Use your existing LDAP as authentication-backend for your wordpress!
So what are the differences to other WordPress-LDAP-Authentication-Plugins?
<ul>
<li>Flexible: You are totaly free in which LDAP-backend to use. Due to the extensive configuration you can freely decide how to do the authentication of your users. It simply depends on your filters</li>
<li>Independent: As soon as a user logs in, it is added/updated to the WordPress’ user-database to allow wordpress to always use the correct data. You only have to administer your users once.</li>
<li>Failsafe: Due to the users being created in WordPress’ User-database they can also log in when the LDAP-backend currently is gone.</li>
<li>Role-Aware: You can map WordPress’ roles to values of an existing LDAP-attribute.</li>
</ul>
For more Information on the configuration have a look at https://github.com/heiglandreas/authLdap

authLdap

This plugin is the only one in WP.org which works out of the box, it's super easy to set up and even has user group mapping included. Thanks once again and totally recommended to every one.

Karolina

Works perfectly and has group mapping!

Use your existing LDAP flexible as authentication backend for WordPress

WPMU Ldap Authentication vs authLdap