DOCUMENT:Q242157  23-OCT-1999  [exchange]
TITLE   :XCON: TP4 Transport Protocol Not Supported Under Windows 2000
PRODUCT :Microsoft Exchange
PROD/VER:winnt:4.0,5.0,5.5
OPER/SYS:
KEYWORDS:exc4 exc5 exc55

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This article discusses a Beta release of a Microsoft product. The 
information in this article is provided as-is and is subject to change
without notice.

No formal product support is available from Microsoft for this Beta 
product. For information about obtaining support for a Beta release, 
please see the documentation included with the Beta product files, or 
check the Web location from which you downloaded the release.
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The information in this article applies to:

 - Microsoft Exchange Server, versions 4.0, 5.0, 5.5 
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SYMPTOMS
========

When you attempt to upgrade an Exchange Server computer with the TP4 transport
protocol from Windows NT 4.0 to Windows 2000, the upgrade does not work and you
receive the following error message:

   The currently installed driver for the TP4 protocol is not compatible with
   Microsoft Windows 2000 and will be disabled during the upgrade.

The upgrade, however, does not continue until the protocol is removed.

CAUSE
=====

The TP4 protocol is no longer supported under Windows 2000.

WORKAROUND
==========

Any Exchange Server computers using the TP4 protocol must remain at Windows NT
4.0.

STATUS
======

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

Additional query words:

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Keywords          : exc4 exc5 exc55 
Technology        : kbExchangeSearch kbExchange500 kbExchange550 kbExchange400 kbZNotKeyword2
Version           : winnt:4.0,5.0,5.5
Issue type        : kbbug
Solution Type     : kbnofix

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