Error message when you try to start the Microsoft Dynamics CRM 3.0 client for Outlook: "An Error occurred loading Microsoft CRM functionality"

When you try to start the Microsoft Dynamics CRM 3.0 client for Microsoft Office Outlook, you receive the following error message: This problem occurs when the ISVIntegration attribute is set to one of the following settings in the Microsoft Dynamics CRM Web.config file:

• All
• Outlook
• OutlookLaptopClient
• OutlookWorkstationClient

Microsoft Dynamics CRM 3.0

This problem is fixed in Microsoft Dynamics CRM 3.0 Update Rollup 1. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

Microsoft Dynamics CRM 3.0 Professional Edition for Service Providers

This problem is fixed in Update Rollup 1 for Microsoft Dynamics CRM 3.0 Professional Edition for Service Providers. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

Microsoft Dynamics CRM 3.0, Japanese version or Chinese version

This problem is fixed in Update Rollup 2 for the Chinese Simplified version of Microsoft Dynamics CRM 3.0 and for the Japanese version of Microsoft Dynamics CRM 3.0. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

To work around this problem, follow these steps:

1. In the Microsoft Dynamics CRM Web.config file, set the ISVIntegration attribute to None or to Web.
   
   After you change this attribute to None or to Web, customizations from the Isv.config.xml file are not introduced when you start the Microsoft Dynamics CRM 3.0 client for Outlook.
2. Open the Isv.config.xml file in Notepad, and then delete the top-level element if it appears as follows.

   <?xml version="1.0" encoding="windows-1252"?>

3. Save the Isv.config.xml file.

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section. This problem was corrected in Microsoft Dynamics CRM 3.0 Update Rollup 1, in Update Rollup 1 for Microsoft Dynamics CRM 3.0 Professional Edition for Service Providers, and in Update Rollup 2 for the Chinese Simplified version of Microsoft Dynamics CRM 3.0 and for the Japanese version of Microsoft Dynamics CRM 3.0.

For more information about the terminology that is used to describe Microsoft software updates, click the following article numbers to view the articles in the Microsoft Knowledge Base: