drahkar

This plugin allows WordPress to authenticate users against an Active Directory. 
Developed to be compatible with current Active Directory releases as well as allow 
for Enterprise level Forest Deployments by allowing you to enter custom BaseDNs.
If you have bugs, suggestions, desires or requirements that you would like to see added 
to this, please come to the plugin page and submit them there so I can keep track 
of them as they are found and resolved.
This plugin is redeveloped off of <a href="https://wordpress.org/extend/plugins/simple-ldap-authentication/" rel="ugc">Simple LDAP 
Authentication</a>.
<h4>How to use</h4>
You can use this plugin in a few different ways.
<ol>
<li>
You can create WordPress accounts which match the names of your Active Directory accounts, and create these users from within the WordPress Users panel. Only the users you create in WordPress will be able to log in.
</li>
<li>
You can tick a checkbox so that anyone who can authenticate via Active Directory can log on. A WordPress account will be automatically created for the user if one does not already exist, with the default user role.
</li>
<li>
You can list the names of Active Directory groups who you want to allow to log on to WordPress. For each group in Active Directory, you can specify a corresponding WordPress user role.
</li>
</ol>
You can also combine the above however you like.

Simple AD Authentication

Authenticates users through Active Directory.

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

Simple AD Authentication vs authLdap