Sign-on with Active Directory Server Authentication
To use Active Directory server authentication for sign-on
Navigate to Policies > Policy Hierarchy.
Click on SSID Policy.
Hover over right section of the line of the SSID you want to configure. When the icons appear, click the Edit (pencil) icon. The Edit SSID page displays.
Click the Guest Portal tab.
Select Sign On with.
Select the Active Directory server you want to use for authentication.
In the Active Directory Server section, configure the settings as required for your organization.