Important This article contains information about how to modify the registry. Make sure that you 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:
322756 How to back up and restore the registry in Windows
After you uninstall the Microsoft Dynamics CRM 3.0 client for Microsoft Office Outlook, the Microsoft Dynamics CRM 3.0 menu still exists on the Outlook menu bar.
Or, after you uninstall the Microsoft Dynamics CRM 3.0 client for Outlook, and you try to install the Microsoft Dynamics CRM 4.0 client for Outlook, the Microsoft Dynamics CRM 4.0 client installation tries to perform an upgrade.
When you open the Microsoft Dynamics CRM 4.0 client for Outlook, you receive the following error message:
An error occurred loading Microsoft Dynamics CRM functionality. Try restarting Microsoft Outlook. Contact your system administrator if error persists.
If you click OK in the error message, the CRM toolbar is listed two times in the Outlook menu bar.
This problem occurs because the Microsoft Dynamics CRM 3.0 client is not completely uninstalled.
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 the 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:
Close Outlook. In Task Manager, verify that the Outlook.exe process and the Microsoft.crm.application.hoster.exe process are not running.
In Add or Remove Programs, uninstall the Microsoft Dynamics CRM 4.0 client for Outlook, or uninstall the Microsoft Dynamics CRM 3.0 client for Outlook.
If the following directories exist on the client computer, delete the directories: