Outlook Web Access (OWA) is a service of Exchange 5.5 Server thatallows users to access and manipulate messages in their Exchangemailbox by using a web browser.
A flaw exists in the way OWA handles inline script in messages inconjunction with Internet Explorer (IE).
A patch is available to fix this vulnerability. Read the Security Bulletin at http://www.microsoft.com/technet/security/bulletin/ms01-057.asp