Citrix App Controller - Saas apps not enumerating for end users

Issue:
The Citrix App Controller is configured for a single domain. Users from other domains are unable to see the published SaaS applications from App controller.

Solution:
Users from multiple domains can't see the published application on App controller because the Netscaler/Access gateway is configured for a single domain. Users are able to authenticate on Netscaler from multiple domains because I was enabled  the port 3268 Global catalog and UPN in the policy. A root DC with Global catalog can serve authentication for all child domains. But still users are not able to  see the applications from App controller.

I found that Netscaler needs to configure Ad authentication for each child domain to populate applications from App controller.  App controller is not detecting users if Netscaler configured for a single domain. Hence, you need to create new AD authentication polices on port 389 or 3268 for each user domain on Netscaler.

Have a nice day!