DOCUMENT:Q247620  05-DEC-1999  [exchange]
TITLE   :XCLN: Clients Cannot Download OAB After Exchange Server Upgrade
PRODUCT :Microsoft Exchange
PROD/VER:winnt:5.5
OPER/SYS:
KEYWORDS:

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

 - Microsoft Exchange Server, version 5.5 
-------------------------------------------------------------------------------

SYMPTOMS
========

After you upgrade Microsoft Exchange Server to version 5.5, users who are
running earlier Exchange clients may receive an error message stating that the
server is unavailable when they attempt to download the Offline Address Book
(OAB).

RESOLUTION
==========

To resolve this issue, specify Microsoft Exchange 4.0 and 5.0 compatibility in
the DS Site Configuration container. Follow these steps:

1. In Exchange Administrator, click the Configuration container, and then click
   the DS Site Configuration object.

2. Click the Offline Address Book tab, and then click the Microsoft Exchange 4.0
   and 5.0 compatibility check box to select it.

   NOTE: If this check box is already selected, click to clear it, and then click
   again to reselect it.

3. Click Generate All.

Additional query words:

======================================================================
Keywords          :  
Technology        : kbExchangeSearch kbExchange550 kbZNotKeyword2
Version           : winnt:5.5
Issue type        : kbprb

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

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 1999.