In the upcoming Microsoft Windows Vista Beta 2 release, the Dynamic HTML Editing ActiveX control is being removed from the Internet Explorer browser. As a result, there is functionality missing that Microsoft Exchange Outlook Web Access relies on. This update replaces that deprecated functionality on the Microsoft Exchange servers so that Microsoft Exchange Outlook Web Access continues to function smoothly.
 
This update is needed if you access Microsoft Outlook Web Access by using Microsoft Internet Explorer 6 or a later version of Internet ExplorerFor more information on this update, see Knowledge Base article 911829.