LDAP|Active Directory Login for Intranet Sites

Step 1: Download and install miniOrange LDAP/AD Login for Intranet Sites

From your WordPress dashboard

From WordPress.org

Once the plugin is activated, LDAP configuration tab will be shown. Scroll down to configure LDAP settings.
Select the directory server protocol (LDAP/LDAPS) from dropdown.
Enter the hostname or IP address of the directory server.
Enter the LDAP server port number.
Enter the username and password to establish the connection to your LDAP server.
Click on Test Connection & Save.

Once the connection is successfully made with your LDAP server then goto the LDAP user mapping configuration.
Click on Possible Search Bases/Base DNs button to see the list of possible search base DNs. Enter LDAP Search Base and select LDAP Username attribute from the dropdown.

Click on Save User Mapping.
In Test Authentication enter the username & password of any ldap user which exists in the configured serach base to test the ldap configuration.

After successful test authentication go to Sign-in Settings tab to configure LDAP login settings.
Enable LDAP login: This option is disabled by default. You can enable LDAP login once you are done with the "Test Connection & Save" in LDAP Connection Information.
Authenticate administrators from both LDAP and WordPress: This option allows users to use either of WordPress credentials or LDAP credentials to login in WordPress site.
Enable Auto Registering users if they do not exist in WordPress: This option is enabled by default and allow the users to register in WordPress after they login into the WordPress site with LDAP credentials.