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Problems when Outlook and Exchange components (2003 and earlier) are installed on the same computer
Article ID: 2715315 - View products that this article applies to.
When you install any Exchange Server 2003 (or earlier) components on the same computer as Microsoft Outlook, various problems can occur with Outlook or with other applications that use MAPI. This includes, but is not limited to the following symptoms:
Therefore, this configuration is not supported nor recommended.
If you have Outlook installed on the same computer as Microsoft Exchange Server, you will want to use Outlook on a different computer.
If you have a workstation that is primarily used for Outlook but that also has Exchange management tools installed (for example, Exchange System Manager), you should perform the following steps to remove the Exchange management tools (assuming you want to keep Outlook installed on the computer):
The following articles and resources provide additional details on this scenario.
266418 Microsoft does not support installing Exchange Server components and Outlook on the same computer
313889 Microsoft does not recommend installing Exchange Server 5.5 and Outlook 2000 or later on the same computer
Exchange and Outlook On The Same Machine
927676 No results are returned when you search for e-mail items after you enable Instant Search in Outlook
820865 You receive the "A recently installed program may cause Microsoft Office or other e-mail-enabled programs to function improperly" error message when you start Outlook
329136 "The information store could not be opened" error message occurs when you try to view client permissions in Exchange Server 2003 or Exchange 2000 Server
(http://go.microsoft.com/fwlink/?LinkId=151500)for other considerations.