The Virtual Desktop Infrastructure (VDI) on-premises model best fits the organization's needs because it enables centralized management and provides users with access to a consistent desktop environment from various in-house workstations, without the necessity of cloud services. While VDI in the cloud could offer a personalized desktop environment, it relies on cloud services, which the organization wants to avoid. Remote desktop services provide access to a shared desktop and applications, not a personalized environment. Desktop-as-a-Service operates on cloud services, not on premises.