The Citrix-provided DLLs included in Windows NT 4.0 Terminal Services Edition still carry a Citrix copyright rather than a Microsoft copyright. Microsoft required Citrix to license their MultiWin technology to Microsoft in order to be allowed to continue offering their own terminal-services product, then named Citrix MetaFrame, atop Windows NT 4.0. The Terminal Services Edition of NT 4.0 relied on Citrix's MultiWin technology, previously provided as a part of Citrix WinFrame atop Windows NT 3.51, in order to support multiple users and login sessions simultaneously. Version 4.0 īased on the ITU-T T.128 application sharing protocol (during draft also known as 'T.share') from the T.120 recommendation series, the first version of RDP (named version 4.0) was introduced by Microsoft with 'Terminal Services', as a part of their product Windows NT 4.0 Server, Terminal Server Edition.

Since the server improvements are not available downlevel, the features introduced with each newer RDP version only work on downlevel operating systems when connecting to a higher version RDP server from these older operating systems, and not when using the RDP server in the older operating system.

Microsoft provides the client required for connecting to newer RDP versions for downlevel operating systems. The Terminal Services server is supported as an official feature on Windows NT 4.0 Terminal Server Edition, released in 1998, Windows 2000 Server, all editions of Windows XP except Windows XP Home Edition, Windows Server 2003, Windows Home Server, on Windows Fundamentals for Legacy PCs, in Windows Vista Ultimate, Enterprise and Business editions, Windows Server 2008 and Windows Server 2008 R2 and on Windows 7 Professional and above. ( Learn how and when to remove this template message)Įvery version of Microsoft Windows from Windows XP onward includes an installed Remote Desktop Connection (RDC) ('Terminal Services') client ( mstsc.exe) whose version is determined by that of the operating system or by the last applied Windows Service Pack. Please help improve it by rewriting it in an encyclopedic style. This article may not properly summarize its corresponding main article.

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