Login with LDAP
Create a Client and corresponding site by following steps corresponding to your router before following this tutorial.
Make sure active directory is setup on your server and note down the active directory username and password.
Enable LDAP Login
Select LDAP Login in Authentication methods and remember to press Finish
Configure LDAP Login Fields
Press the config button to configure the fields asked from guest while logging in.
Provide Session Control Parameters
Provide LDAP Details
Host name should be hostname of the server on which Active Directory is running.
Domain name should be exactly same as what domain name you have configured in Active Directory.