Let's enable the LDAP/Active Directory integration.
Click on the Settings link under the Configuration section.
On the new page which appears, click on the Authentication tab to bring up the settings for the authentication.
Select LDAP Authentication from the Authentication Method drop-down box.
Select No User as the Guest User.
Enter the IP address of your domain controller into the Server field.
As the Distinguished Name (DN) enter <username>@MYDOMAIN.local and replace MYDOMAIN.local with your domain name.
For the Search Base enter dc=MYDOMAIN,dc=local and replace MYDOMAIN and local accordingly.
Click on the Save button.