DOCUMENT:Q162404  09-AUG-2001  [winnt]
TITLE   :Service Pack 5 Breaks Microsoft Mail Shared Using FPNW
PRODUCT :Microsoft Windows NT
PROD/VER:winnt:3.51,4.0
OPER/SYS:
KEYWORDS:kbnetworkkbfixlist

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The information in this article applies to:

 - Microsoft Windows NT Server versions 3.51, 4.0 
 - Microsoft File and Print Services for NetWare versions 3.51, 4.0 
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IMPORTANT: This article contains information about editing the registry.
Before you edit the registry, make sure you understand how to restore it
if a problem occurs. For information on how to do this, view the "Restoring
the Registry" online Help topic in Regedit.exe or the "Restoring a Registry
Key" online Help topic in Regedt32.exe.

SYMPTOMS
========

After you apply Service Pack 5 for Windows NT 3.51 or upgrading to Windows NT
4.0 and FPNW for 4.0, any Microsoft Mail postoffices that are shared using File
and Print Services for NetWare (FPNW) may experience errors. External.exe may
log an error [012] when delivering mail to the postoffice. Dirsync.exe may not
run automatically, and may generate warning [154]. When you perform a manual
DirSync, the postoffice will receive updates but will not send any updates to
other postoffices.

CAUSE
=====

A problem was introduced while attempting to improve an OS/2 file-date issue.

RESOLUTION
==========

WARNING: Using Registry Editor incorrectly can cause serious problems that may
require you to reinstall your operating system. Microsoft cannot guarantee that
problems resulting from the incorrect use of Registry Editor can be solved. Use
Registry Editor at your own risk.

For information about how to edit the registry, view the "Changing Keys And
Values" online Help topic in Registry Editor (Regedit.exe) or the "Add and
Delete Information in the Registry" and "Edit Registry Data" online Help topics
in Regedt32.exe. Note that you should back up the registry before you edit it.

1. Run Registry Editor (Regedt32.exe) and locate the following subkey:

   HKey_Local_Machine\SYSTEM\CurrentControlSet\Services\FPNW\Parameters

2. From the Edit menu, click Add Value.

3. Type the name of the value as MaxCachedOpenFiles.

4. Set the type to REG_DWORD and enter 0 (zero) for the value.

STATUS
======

Microsoft has confirmed this to be a problem in Windows NT versions 3.51. A
supported fix is now available, but is not fully regression tested and should be
applied only to systems experiencing this specific problem. Unless you are
severely impacted by this specific problem, Microsoft recommends that you wait
for the next Service Pack that contains this fix. Contact Microsoft Technical
Support for more information.


Microsoft has confirmed this to be a problem in Windows NT version 4.0. This fix
is now available in the latest U.S. Service Pack for Windows NT version 4.0. For
information on obtaining the Service Pack, query on the following word in the
Microsoft Knowledge Base (without the spaces):

   S E R V P A C K


Additional query words: FPNW

======================================================================
Keywords          : kbnetwork kbfixlist
Technology        : kbWinNTsearch kbWinNT351search kbWinNT400search kbWinNTSsearch kbWinNTS400search kbWinNTS400 kbWinNTS351 kbWinNTS351search kbServicesNetwareSearch kbFPNW351 kbFPNW400
Version           : winnt:3.51,4.0
Issue type        : kbbug

=============================================================================

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SO THE FOREGOING LIMITATION MAY NOT APPLY.

Copyright Microsoft Corporation 2001.