This article describes how to use the Exchange Server Mailbox Merge Wizard (ExMerge) tool to
upgrade to Microsoft Exchange 2000 Server or to Microsoft Exchange Server 2003. This upgrade method is intended primarily for
To obtain the Exchange Server Mailbox Merge Wizard (ExMerge) tool, visit the following Microsoft Web site:
For more information about how to download Microsoft Support files, click the following article number to view the article in the Microsoft Knowledge Base:
How to obtain Microsoft support files from online services
ExMerge is also located in the
Support\Utils\I386\Exmerge folder on the Exchange 2000 CD and on the Exchange 2003 CD. To obtain the latest version of ExMerge for Microsoft Exchange Server
5.5, contact Microsoft Product Support Services.
To use ExMerge to upgrade to
Exchange 2000 or to Exchange 2003, follow these steps:
- Use the ExMerge tool to export all of the user's mailbox
data to a .pst file, and then export public folder data to a .pst file by using a
Microsoft Outlook (MAPI) client.
- Remove Exchange Server 5.5 from the existing server (if the
same server is being used).
- Install Exchange 2000 or Exchange 2003. This includes the latest service pack and update rollups.
- Import your mailbox and public folder data from the .pst
files that you created in step 1.
The following sections of this article describe how to migrate
mailbox data and public folder data in more detail.
list describes some of the advantages of using ExMerge to upgrade to Exchange
2000 or to Exchange 2003:
- ExMerge provides an alternate recovery method that you
can use in case an in-place upgrade is not successful.
- You can use ExMerge to secure data from a failing server
and to run a clean installation of Exchange 2000 or Exchange 2003.
The following list describes some of the disadvantages of using
ExMerge to upgrade to Exchange 2000 or to Exchange 2003:
- You must create new mailboxes for all users before you
import the mailboxes.
- You must re-create all permissions on the public folders.
- You cannot reply to old messages from users on this
- You must reconfigure all connectors.
- You must re-create all distribution lists.
- You must re-create custom recipients.
- You must create new Exchange client profiles at each user
desktop. If the server name does not change, new client profiles may not be
- If users use Offline Folder Storage files (.ost), they must
export these files to a .pst file before they connect to the new server. You
will lose single-instance storage in your mailbox store. This loss may
potentially cause your mailbox database to grow two or more times its original
size. However, the mailbox database growth is typically less than that. The
amount of growth depends on your internal use of distribution lists (DLs) and
the retention of e-mail messages that were sent to those DLs.
Migrating Mailbox Data
- Stop the Exchange Server 5.5 message transfer agent (MTA)
to prevent new messages from arriving.
- Make full online backups and offline copies of your
databases (Priv.edb and Pub.edb).
- Use ExMerge to run stage 1 of a two-stage ExMerge
procedure to export all mailbox data to a .pst file on a shared network
- On the new Exchange 2000 computer or Exchange 2003 computer, open the Active
Directory Users and Computers management console, right-click a user account (you can select multiple user accounts at a time), and then click Exchange Tasks.
- Click Create Mailbox, and then click Next.
- Verify that the correct Exchange 2000 or Exchange 2003 computer and mailbox
store are selected, click Next, and then click Finish.
NOTE: Make sure that you create mailboxes using the mailbox alias name
that was used on the server that was running Exchange Server 5.5.
- Assign the Administrator account the appropriate
permissions to use ExMerge on all mailboxes on the Exchange 2000
computer or on the Exchange 2003 computer.
- Make sure that the default recipient policy in Exchange
System Manager is configured to stamp mailboxes with the correct domain names
(the name after the @ sign) and that new mailboxes have been stamped with the
correct Simple Mail Transfer Protocol (SMTP) address.
- Use ExMerge to run stage 2 of a two-stage ExMerge
procedure, and then import all mailbox data from the .pst file that you
exported to the network drive in step 3.
Migrating Public Folder Data
ExMerge does not work with public folders, it only works with
mailboxes. When you use ExMerge to upgrade to Exchange 2000 or to Exchange 2003, you have to
download public folders on the server that is running Exchange Server 5.5 to a
.pst file on an Outlook (MAPI) client, and then publish this file on the new
Exchange 2000 computer or on the new Exchange 2003 computer.
- Use an account on a Microsoft Outlook 2002 or Microsoft Office Outlook 2003 client computer that has
administrative rights to log on to a mailbox on the server that is running
Exchange Server 5.5.
- On the File menu, point to New, and then click Outlook Data File.
- Click Personal Folders File (.pst), and then click OK.
- Name the file Public.pst, save the file to a path that has
a lot of free disk space, and then write down the location where the file is
NOTE: The .pst files have storage limits of 2 gigabytes (GB)
For more information, click the following article number to view the article in the Microsoft Knowledge Base:
Description of the purpose and capacity of Outlook storage facilities
- Accept the default settings that are listed in the
Create Microsoft Personal Folders dialog box, and then click OK.
A new folder group that is named Personal Folders is
created in Outlook.
- In the Outlook folder list, expand Public Folders, and then expand All Public Folders.
- Drag each top-level public folder that you want to export
to the Personal Folders folder that you created in step 4.
top-level public folders and their subfolders are copied.
- Log off the Outlook client.
- From the Outlook client, use an account that has
administrative rights to log on to a mailbox that is homed on the Exchange 2000 computer or on the Exchange 2003 computer.
- On the File menu, point to New, and then click Outlook Data File.
- Click Personal Folders File (.pst), locate and click the .pst file that you created in step 4, and
then click OK two times.
- Drag the folders from the Personal Folders folder to All
Public Folders in the Outlook folder list.
For more information about using ExMerge, click the following article numbers to view the articles in the Microsoft Knowledge Base:
Some questions and answers about the ExMerge utility
How to configure an account to use the ExMerge utility in Exchange 2000 Server and in Exchange Server 2003
ExMerge does not work unless you have Receive As and Send As permissions on the store
ExMerge 2000 only runs on Windows 2000-based computers
Article ID: 327304 - Last Review: October 25, 2007 - Revision: 7.5
- Microsoft Exchange Server 2003 Enterprise Edition
- Microsoft Exchange Server 2003 Standard Edition
- Microsoft Exchange 2000 Server Standard Edition
- Microsoft Exchange Server 5.5 Standard Edition