I've a Xchange 2003 Server, with latest SP on a W2K3 server same sp level. Server has no particular errors or warning and every 2/3 weeks OWA stop to work: IIS return a page not found to all users. Exchange still works with outlook, pop, imap4, SMTP, except push mail sometime, IIS seems to work fine and I have NO ERROR in every log... I can restart all services but IIS doesn't serve page to OWA users. Seems that IIS can't access xchange but..why?????? Kato

Hi, Please try to refer to the article below to make a backup for IIS metabase and then try to follow the steps in article below to reset OWA related virtual directory. Besides,we canenable diagnostic log on server to gather diagnostics information for troubleshooting purposes. XWEB: Diagnostic Logging Levels for OWA Defined in the Exchange Administrator Program http://support.microsoft.com/default.aspx/kb/246248 Note: A full backup can help to roll back to the previous settings if any unexpected issue occur. How To Create a Metabase Backup by Using IIS 6.0 in Windows Server 2003 http://support.microsoft.com/kb/324277 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/kb/883380 Regards, Xiu

Thanks! But we tried this before, still no good.....Kato