Captive Portal supports the way to authenticate via an externally hosted AD server. The option is available at Configure > SSID > Captive Portal > Active Directory.
Follow the steps below to configure your AD service.
1. Click Add a server to add a new AD server in the list.
2. Enter the IP address or domain name of your AD server in the Host field and the AD server listening port in the Port field.
4. Click OK and then click Apply button.