If the RDP client is run on a Windows NT 3.5x computer, then that client requires a Windows NT Workstation Upgrade license. If the RDP client is run on a computer running Windows NT 4.0 (Server, Workstation, or Terminal Server) client already purchased the license, and it is not necessary to purchase an additional Windows NT Workstation. This is necessary because the Terminal Server Client effectively provides a Windows NT Workstation to the client. The first license is a Windows NT Workstation license. Terminal Server Clients require two licenses to connect to a Terminal Server. Terminal Server's licensing requirements are different from those of Microsoft Windows NT Server.Īpplies to: Windows Server 2012 R2 Original KB number: 187629 Licenses to connect to Terminal Server This article describes Terminal Server licensing.