Known issues in Outlook 2010 when you try to develop form regions
Consider the following scenario. You create a form region in Microsoft Visual Studio Tools for Microsoft Office (VSTO) 2008. In the manifest, you specify custom default icons for Outlook items that use your form region. In this scenario, the icons are not displayed in Outlook's folder list. Although customers have experienced this problem, Microsoft cannot reproduce this issue. If you encounter this issue, please contact Microsoft Customer Service and Support so that we can investigate further.
Related Microsoft Knowledge Base articles
For more information about known issues that occur when you use form regions in Microsoft Office Outlook 2007, click the following article number to view the article in the Microsoft Knowledge Base:
Article ID: 2265572 - Last Review: 08/26/2011 21:45:00 - Revision: 1.2