DOCUMENT:Q173123  07-JAN-2000  [exchange]
TITLE   :XCLN: 5.0/SP1 Macintosh Client Drops Three-Letter Extension
PRODUCT :Microsoft Exchange
PROD/VER:WINDOWS:5.0
OPER/SYS:
KEYWORDS:kbusage

======================================================================
-------------------------------------------------------------------------------
The information in this article applies to:

 - Microsoft Exchange Macintosh client, version 5.0 
-------------------------------------------------------------------------------


SYMPTOMS
========


When you send an attachment from the Microsoft Exchange Macintosh client, version
5.0 Service Pack 1, if the client does not recognize the attachment, then the
three-letter extension (if any) will not be preserved. As a result, receiving
Windows clients will be unable to open the attachment from the message body. If
the attachment is saved locally from a Windows client, the Save As dialog box
will not have a three-letter extension on the filename.

WORKAROUND
==========

If you manually add the correct three-letter extension to the file after saving
locally from a Windows client, the file executes as expected.

STATUS
======

Microsoft has confirmed this to be a problem in Microsoft Exchange Macintosh
Client version 5.0. This problem has been corrected in the latest U.S. Service
Pack for Microsoft Exchange Server version 5.0. For information on obtaining the
service pack, query on the following word in the Microsoft Knowledge Base:

   " SERVPACK " (without the quotation marks)

MORE INFORMATION
================

When you send an attachment from the Macintosh client, the three-letter
extension (if any) is stripped off. The creator and type information of the file
are examined. If there is a match in the Exchange Preferences file, Mac File
Types list, then the associated three-letter extension is added. If there is no
match, then the original three-letter extension is not added back, but it should
be and is in the original 5.0 client.

Next, the creator and type information are stripped from the attachment and the
Exchange Preferences file, Windows File Types list is checked. If the attachment
is listed here, it is encoded as MacBinary2 and sent to the information store.
If it is not in this list, then it is sent as Application/Octet-Stream to the
information store.

Additional query words: macbinary macbinary2 application octet stream .BIN 8.3

======================================================================
Keywords          : kbusage 
Technology        : kbHWMAC kbOSMAC kbExchangeSearch kbExchangeClientSearch kbExchange500Mac
Version           : WINDOWS:5.0
Issue type        : kbbug
Solution Type     : kbfix

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

THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS
PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND.  MICROSOFT DISCLAIMS
ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  IN NO
EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR
ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL,
CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF
MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES.  SOME STATES DO NOT ALLOW THE EXCLUSION
OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES
SO THE FOREGOING LIMITATION MAY NOT APPLY.

Copyright Microsoft Corporation 2000.