An administrator is tasked with setting up an integration between Nutanix and Citrix PVS. After installing the Nutanix AHV plug-in for PVS, the administrator is unable to use the integration in Citrix PVS. What step must the administrator take to resolve the issue?

After installing the Nutanix AHV Plug-in for Citrix Provisioning (PVS), the integration components must be registered with the relevant Citrix services. The Citrix Virtual Apps and Desktops Setup Wizard, which is run from the PVS console, communicates with the Citrix Broker Service on the Delivery Controller to create machine catalogs and add machines. Restarting the Citrix Remote Broker Provider Service forces it to reload its configuration and recognize the newly installed Nutanix AHV plug-in, enabling the integration to function correctly.

A. Installing the plug-in is a prerequisite. The question states this was already done, and the issue occurred after installation.
B. The MCS (Machine Creation Services) plug-in is for a different provisioning technology and is not relevant for a Citrix PVS integration.
D. The Citrix Remote HCL Server service is related to the hypervisor connection layer, but the Broker service is more directly involved with catalog creation.

Nutanix University: Nutanix End User Computing Administration (NEUCA) courseware, Module on Citrix Integration. While specific service names can vary slightly by version, the principle of restarting broker services on the DDC after plug-in installation is a standard procedure.

Citrix Product Documentation: SDKs and APIs > Broker PowerShell SDK. This documentation outlines the role of the Broker service in managing and creating machine catalogs, which is the function enabled by the Nutanix plug-in.