Owa

MusTech.Net: Music Education, Music Technology, & Education! » Windows Vista Webmail (OWA) Fix For Internet Explorer 7- Five Step Fix

http://mustech.net/2007/02/20/windows-vista-webmail-owa-fix-for-internet-explorer-7-five-step-fix allow IE7/IE8 to compose mails in OWA

How to reset the default virtual directories that are required to provide Outlook Web Access, Exchange ActiveSync, and Outlook Mobile Access services in Exchange Server 2003

http://support.microsoft.com/?id=883380 well, if getting some weird errors from OWA after you (or some app you have installed ) messed IIS config – you can re-install OWA, re-create all owa directories w/out touching exchange installation itself