Hi there, Can't find this listed anywhere on the forum. Apologies if this has been discussed before. We will be building a system with 75 Yealink handsets on a dedicated server running Microsoft Server 2012. The server will only be for the 3CX system and DHCP will be performed on a separate server running LINUX. Does Microsoft Server 2012 class IP handsets as Network devices and require device cals for these? I believe not as the devices are not using any of the Microsoft Server tools. :?: Thanks.