May 22, 2019 - 06:50 AM
You can buy on a Per User or Per Device basis depending on which suits your environment best.
If its on their own device you can stop reading this now...
There only other licensing requirement is access to the Windows Server Services if that is where the VDI is - Windows CAL & Windows Remote Desktop Services CAL.
If you are running your VMs on a non-MS platform then you will not need the Windows or Windows RDS CALs - although if they are receiving other services requiring these you might have them already.
If the primary user does not have an assigned device with a qualifying Windows OEM (e.g. Windows XP or Apple) then you purchase Windows VDA which is a full operating system license.
May 22, 2019 - 09:11 AM
/ is a good reference. No licensing required for that piece.
To be able to license a virtual desktop running alongside a physical desktop, you will need either:
a) an upgrade with Software Assurance (U&SA or SA) for a system with Windows OEM
b) VDA subscriptions for systems without a Windows OEM license (i.e. Mac)
Microsoft's example for local Windows virtual machines running alongside a on OS deployed on a physical system is:
"An organization has a group of developers who need to test an application across multiple Windows images running in local virtual machine on PCs running Windows 10 Pro. The PC or the primary user of the PC needs active Windows Software Assurance, which permits running up to four virtual machines concurrently." (source: http://download.microsoft.com/downloa... - page 6)
For reference, if you wanted to take a retired Windows 10 desktop and re-install Windows XP on it, then you would need to buy a commercial license to do that instead of using the inherent OEM licensing rights. Windows 10 OEM does not have downgrade rights to XP. However, Windows 7 and 8.x system do have XP downgrades. (source: https://download.microsoft.com/downlo...)