SBS 4.5 Exchange 5.5 Setup on SBS 2000 Does Not Succeed with Error "0xc002041d"

While you attempt to install the Microsoft Exchange Server 5.5 from Microsoft Small Business Server (SBS) 4.5 on an SBS 2000 installation for Exchange Disaster Recovery purposes, or when it is necessary to recover a user's mailbox from an Exchange 5.5 Information Store, you may receive the following error messages: After the first error message, you receive the following error message: The following two error messages are logged in the Event Viewer Application log:

The System Log of Event Viewer will report the following error:

This error message appears because the SBS 4.5 Exchange 5.5 Setup requires an application compatibility (appcompat) dynamic link library (DLL) to install properly on SBS 2000. In most cases, this information is already present in the registry and so the appcompat DLL is also present. If so, the error messages and attendant problems are not a factor, therefore, additional steps are not necessary to set up SBS 4.5 Exchange 5.5 Server on the SBS 2000 server. If this is not the case, you need to manually copy the necessary file from the CD-ROM, and then add the necessary information into the registry as described in the "Resolution" section of this article.

WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.

To make sure that SBS 4.5 Exchange 5.5 Server can install on SBS 2000:

1. Verify that you have completely removed Exchange 5.5 by using the steps that are outlined in the following Microsoft Knowledge Base article, and then restart the computer if necessary:
   259158  (http://support.microsoft.com/kb/259158/EN-US/ ) XADM: How to Manually Remove Exchange Server 5.5 Completely
2. Copy the following text, paste it in Notepad, and then save the file as store.reg:

   Windows Registry Editor Version 5.00
   
   [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\AppCompatibility\store.exe]
   "DllPatch-SBSUpgrade"="_sbsw2ku.dll"
   "SBSUpgrade"=hex:0c,00,00,00,00,00,00,00,03,00,00,00,0d,00,00,00,08,00,00,00,\ 
   35,00,2e,00,35,00,00,00,0e,00,00,00,26,00,00,00,4d,00,69,00,63,00,72,00,6f,\ 
   00,73,00,6f,00,66,00,74,00,20,00,45,00,78,00,63,00,68,00,61,00,6e,00,67,00,\ 
   65,00,00,00,0f,00,00,00,14,00,00,00,45,00,4d,00,53,00,20,00,53,00,74,00,6f,\ 
   00,72,00,65,00,00,00,00,00,00,00
   						

3. Locate the Store.reg file in Windows Explorer, and then double-click it to enter the value into the registry.
4. Insert CD-ROM 1 of the SBS 2000 CD-ROM set into your CDROM drive. Copy the \i386\_sbsw2ku.dll file from the CD-ROM to your %SystemRoot%\AppPatch folder.
5. Restart the SBS 4.5 Exchange Server 5.5 Setup.

Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.

Running the SBS 4.5 Exchange Server 5.5 on SBS 2000 is not supported. In certain cases, such as disaster recovery scenarios or when restoring individual mailboxes from backup, it may be necessary to temporarily install the SBS 4.5 Exchange Server 5.5 on an SBS 2000 server. After you have restored the data, you have to either upgrade the Exchange 5.5 installation to Microsoft Exchange 2000 Server or uninstall it.

If Windows 2000 service pack 2 is installed on the server, the fix in this article may not work. For additional information about this, click the article number below to view the article in the Microsoft Knowledge Base: