Microsoft KB Archive/246188

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Error Message "This Feature Is Not Available in This Version of Terminal Server" Using Network Adapter Teaming

Article ID: 246188

Article Last Modified on 12/26/2006


  • Microsoft Windows NT 4.0 Service Pack 3
  • Microsoft Windows NT 4.0 Service Pack 4
  • Microsoft Windows NT 4.0 Service Pack 5
  • Microsoft Windows NT 4.0 Service Pack 6
  • Microsoft Windows NT 4.0 Service Pack 4
  • Microsoft Windows NT 4.0 Service Pack 5
  • Microsoft Windows NT 4.0 Service Pack 6

This article was previously published under Q246188

IMPORTANT: This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base:

256986 Description of the Microsoft Windows Registry


While you are trying to form a network adapter team (also known as an adapter fault-tolerant team) with an Intel Pro 100 Intelligent Server adapter, the following error message may be displayed on Windows NT 4.0 Server:

This feature is not available for this version of Windows NT Terminal Server

This message may be displayed even though you are forming the fault-tolerant team on Windows NT 4.0 Server, not Terminal Server.


The utility that is used to form the team looks for an entry named "Terminal Server" in the registry at the following location:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\

If this key is found, the error message is displayed and the formation of the adapter fault-tolerant team is not allowed, even if you are not using Terminal Server.


WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.

As a workaround, you can back up and then delete the key listed above. After the key is deleted, you can form the adapter fault-tolerant team. After you form the team, you can add the registry key back.

NOTE: None of the information in this article applies to Windows NT 4.0, Terminal Server Edition. No changes should be made to a Windows NT 4.0 Terminal Server based on this article.


Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.


The Terminal Server registry key is added by the installation of some programs that can also be installed in Terminal Server, such as Microsoft Office.

Support for network adapter fault tolerance was made available after Window NT 4.0 Service Pack 3. Windows NT 4.0 does not directly provide support for this feature, but it is provided by some manufacturers of network adapters. This feature is not available in Terminal Server. For more information, and a list of manufacturers that provide network adapter fault tolerance, see the following Microsoft Knowledge Base article:

171415 Network Adapter Fault Tolerance for Windows NT 4.0

Keywords: kberrmsg kbenv kbnetwork kbprb KB246188