Microsoft KB Archive/170391

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Article ID: 170391

Article Last Modified on 10/30/2006


  • Microsoft Mail for PC Networks 3.2, when used with:
    • Microsoft Windows NT Advanced Server 3.1
    • Microsoft Windows NT 4.0

This article was previously published under Q170391


After you install Microsoft Mail version 3.2 and run the MS-DOS Message Transfer Agent (External.exe) in Windows NT, the computer system clock increments by 24 hours.


This problem occurs if the BIOS type of the computer is not detected properly. This problem may occur on any network operating system that is running the MS-DOS Message Transfer Agent and the Postoffice is located on the system.


To correct this problem, do one of the following:

  • Make sure the following entry in the External.ini file for Mail version 3.2x is set as follows: ClockRollOver=0
  • From the MS-DOS command prompt, run External.exe with the /ClockRollOver switch as follows: EXTERNAL /ClockRollOver=0

NOTE: The ClockRollOver value is set to 1 by default. If you set this value to 0, EXTERNAL does not attempt to read the system BIOS.


External.exe version 3.2.13 or later is required to correct this problem.

To Update Your MS-DOS External.exe File

You can find Extupd.exe, a self-extracting file, on the following services:

  • Microsoft's World Wide Web Site on the Internet On the home page, click the Support icon. Click Knowledge Base, and select the product. Enter kbfile Extupd.exe, and click GO! Open the article, and click the button to download the file.
  • Internet (anonymous FTP) ftp Change to the Softlib/Mslfiles folder. Get Extupd.exe.
  • The Microsoft Network On the Edit menu, click Go To, and then click Other Location. Type "mssupport" (without the quotation marks). Double-click the MS Software Library icon. Find the appropriate product area. Locate and Download Extupd.exe.

Keywords: kbprb KB170391