Microsoft KB Archive/910918

= You receive an &quot;Error in registry for extension 'Exchange Extensions'&quot; error message when you start Outlook 2003 after you install Groove =

Article ID: 910918

Article Last Modified on 12/5/2005

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APPLIES TO


 * Groove Virtual Office 3.0 File Sharing Edition
 * Groove Virtual Office 3.0 Professional Edition
 * Groove Virtual Office 3.0 Project Edition
 * Groove Virtual Office 3.1 File Sharing Edition
 * Groove Virtual Office 3.1 Professional Edition
 * Groove Virtual Office 3.1 Project Edition
 * Groove Workspace 2.5 Preview Edition
 * Groove Workspace 2.5 Professional Edition
 * Groove Workspace 2.5 Project Edition
 * Groove Workspace 2.5 Standard Edition

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Important This article contains information about how to modify the registry. Make sure to back up the registry before you modify it. Make sure that you know how to restore the registry if a problem occurs. For more information about how to back up, restore, and modify the registry, click the following article number to view the article in the Microsoft Knowledge Base:

256986 Description of the Microsoft Windows registry



SYMPTOMS
When you start Microsoft Office Outlook 2003 after you install Groove Virtual Office or Groove Workspace, you receive the following error message:

Error in registry for extension &quot;Exchange Extensions;?&quot;. The syntax or format of the registry entry is incorrect. Check the registry settings and compare the registry for this extension to the other extensions in the registry.



CAUSE
This problem occurs if the value for the Exchange Extensions registry entry has become corrupted.



RESOLUTION
Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall your operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.

To resolve this problem, follow these steps:  Click Start, click Run, type regedit, and then click OK. Locate and then click the following subkey:

HKEY_LOCAL_MACHINE\Software\Microsoft\Exchange\Client\Extensions

 Double-click Exchange Extensions. Delete the value in the Value data box, and then click OK. Quit Registry Editor. Restart Outlook 2003 to re-create the Exchange Extensions registry entry.</li></ol>

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MORE INFORMATION
For more information about this problem, click the following article number to view the article in the Microsoft Knowledge Base:

823633 'Error in registry for extension &quot;Exchange Extensions;?&quot;' error message when you start Outlook 2003 or when you open and then close the Add-In Manager dialog box in Outlook 2003

Additional query words: TCN-01759

Keywords: kbprb kbexpertiseinter KB910918

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