DOCUMENT:Q170280  10-MAY-2002  [exchange]
TITLE   :XADM: Upgrading From Exchange Standard Edition to the Enterprise
PRODUCT :Microsoft Exchange
PROD/VER::4.0,5.0,5.5
OPER/SYS:
KEYWORDS:exc4 exc5 exc55

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

 - Microsoft Exchange Server, versions 4.0, 5.0, 5.5 
 - Microsoft Exchange 2000 Enterprise Server 
 - Microsoft Exchange 2000 Server 
-------------------------------------------------------------------------------

To upgrade the Standard Edition of Microsoft Exchange Server to the
Enterprise Edition of Microsoft Exchange Server, run the Setup program from
the Exchange Server Enterprise Edition compact disc and click the Reinstall button.

To install any additional components or connectors included in the
Enterprise Edition of Exchange Server, run the setup program again and
click Add/Remove.

NOTE: Once upgraded you cannot downgrade Exchange Enterprise Server edition to the standard version of Exchange Server.

For additional information about a case in which the upgrade is not possible because of the different packaging of the product, click the article number below 
to view the article in the Microsoft Knowledge Base:

   Q312426 XADM: Cannot Upgrade from BackOffice Exchange 2000 Server Standard


Additional query words:

======================================================================
Keywords          : exc4 exc5 exc55 
Technology        : kbExchangeSearch kbExchange500 kbExchange550 kbExchange400 kbZNotKeyword2 kbExchange2000Search kbExchange2000Serv kbExchange2000EntServ
Version           : :4.0,5.0,5.5
Issue type        : kbhowto

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

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 2002.