There is also no such thing as a "site license". All MS software licenses that are NOT visual studio or client access licenses are per device licenses. You likely have a subscription agreement and will have to declare these devices on your anniversary date of the agreement if the company/establishmenst still owns them on that date.
Adding to a Microsoft WIndows Server controlled domain is normaly only possible with Pro and Enterprise editions of the desktop O/S.
Seems to still be true. You need to be registered to view this link, please log-in or register
Do you have a Microsoft Volume license agreement. Is it a subscription license? In which case if the establishment owns them (all 3 must be true), you may have the right to install enterpise edition on those machines.
If you are an admin on the agreement you can find out by logging in herehttps://www.microsoft.com/Licensing/ser ... fault.aspx
Me? 8 years on the Ask partner/Ask Edu team for Microsoft UK, but I have been out of the game for about 3 years.
Linx 1010b and Linx 12v64 owner
Also, Larper, Table top roleplayer and wargamer, retro computer games enthusiast (Amiga 1200, 030/50 accelorator card and SD Card hard disk and CD drive, Atari 8 bit computers with SIO2SD, next pimp project, the Sinclair Spectrums)