Microsoft Licensing for Multi-User Sessions (vSpace)

Microsoft Licensing for Multi-User Sessions (vSpace)

Overview

This article provides general guidance on Microsoft licensing requirements for multi-user environments utilizing NComputing vSpace technology. NComputing only supports its own products; all Microsoft licensing questions must be directed to Microsoft or a certified Microsoft licensing partner.

Multi-user Single OS Model

For applications where multiple interactive users are simultaneously sharing a single operating system (the core use case for vSpace), standard Microsoft Windows Server licensing applies. The shared host computer (or virtual machine) must run a Microsoft Windows Server operating system.

In addition to the Windows Server OS license, the following Client Access Licenses (CALs) are required for each end-user or device that accesses the Windows Server:

  1. Microsoft Windows Server Client Access License (WS CAL): Required for each user or device accessing the Windows Server.
  2. Microsoft Remote Desktop Services Client Access License (RDS CAL): Formerly known as a Terminal Services Client Access License (TS CAL), this is required for each user or device utilizing the Remote Desktop Services functionality.

Key Licensing Nuances:

  • Licensing Server: A dedicated Remote Desktop Licensing Server must be set up and configured to issue and manage the RDS CALs. This server must be joined to the Remote Desktop Session Host.
  • CAL Type: Microsoft offers CALs per User or per Device. For multi-user environments with NComputing devices, it is generally recommended to implement CALs per User to ensure compliance of the session itself.

Important Microsoft Restriction

You cannot run Windows Client Operating Systems (such as Windows 11, Windows 10, Windows 8, or Windows 7) to allow multiple simultaneous users to access and use the operating system software. Only Microsoft Windows Server software is licensed, designed, and supported by Microsoft for multiple simultaneous users. Attempting to use a client OS for this purpose is a violation of Microsoft's licensing terms.

Disclaimer

The information provided here is based on current Microsoft licensing knowledge as it relates to NComputing vSpace deployments. Microsoft's licensing policies and terms are subject to change at any time without notice. Customers are responsible for ensuring full compliance with all applicable Microsoft licensing agreements. Always refer to Microsoft's official documentation or consult a certified Microsoft licensing specialist for the most accurate and up-to-date information.


For further details, please refer to Microsoft's official documentation. You can also refer to our official Windows Multiuser Licensing webpage. 


Article #KB864
Last Edited: 11/13/2025