Windows 7 Upgrade license does cover you for VDI (with view/xendesktop etc)
Hi, I recently called Microsoft about this. They told me that as long as you have the original OEM licenses for the old desktop hardware being repurposed as a thin client, and you are an EES subscriber with the Windows 7 upgrade license, then you are also licensed to run Windows 7 as virtual desktops. You might want to check out the software assurance benefit with EES called Windows Fundamentals for repurposing the old desktop hardware.