Scenario: A Citrix Architect has met with a team of Workspacelab members for a design discussion. They have captured the following requirements for the Citrix ADC design project:
* Multi-factor authentication must be configured the Citrix Gateway virtual server.
* The Citrix Gateway virtual server is integrated with the Citrix Virtual Apps and Desktops environment.
* Load balancing must be configured for the StoreFront server.
* Authentication must be deployed for the users from the workspacelab.com and vendorlab.com domains.
* The logon page must have the workspacelab logo on it.
* Certificate verification must be performed to identify and extract the username.
* The client certificate must have UserPrincipalName as a subject.
* All the managed workstations for the workspacelab users must have the client identification certificate installed on them.
* The workspacelab users connecting from the internal network should be authenticated using LDAP.
* The workspacelab users connecting from the external network should be authenticated using LDAP and RADIUS.
* The vendorlab users should be authenticated using Active Directory Federation Service.
* The user credentials must NOT be shared between workspacelab and vendorlab.
* Single Sign-on must be performed between StoreFront and Citrix Gateway.
* A domain drop down list must be provided if the user connects to the Citrix Gateway virtual server externally.
* The domain of the user connecting externally must be identified using the domain selected from the domain drop down list.
Which authentication policy must the architect execute first to meet the design requirements?