D. Install the Universal Print Server on all print servers in the Site and update the Universal printer driver usage policy setting.
By installing the Universal Print Server on all print servers, the administrator can centralize print management and reduce the dependency on native Windows drivers. Additionally, updating the Universal printer driver usage policy setting ensures that the Citrix environment prioritizes the use of the universal printer driver, further reducing the need for native drivers.
Option A (Enable the Citrix Universal Print Driver) and Option C (Configure the Citrix Universal Generic Printer) are not sufficient on their own to reduce the number of native drivers being used. They may be part of the overall solution, but they do not address the requirement directly.
Option B (Install the Universal Print Server on all print servers) aligns with the requirement, but it is necessary to update the Universal printer driver usage policy setting to ensure the proper utilization of the Universal Print Server.