Microsoft KB Archive/175891

= XADM: Outlook Web Access Needs Anonymous and Clear Text Authentication on Internet Information Server =

Article ID: 175891

Article Last Modified on 10/28/2006

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APPLIES TO


 * Microsoft Exchange Server 5.5 Standard Edition

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This article was previously published under Q175891



SUMMARY
When Microsoft Exchange Server version 5.5 is configured to support Outlook Web Access (OWA) clients, the Microsoft Internet Information Server (IIS) must be configured for Anonymous and (Basic) Clear Text authentication, but only if IIS and Exchange Server are not located on the same computer.



MORE INFORMATION
For directory and information store access, the OWA client establishes a MAPI login to the Exchange Server computer that it is connected to. When NTLM authentication is enabled on the IIS server, OWA can only access information on the local server. Any attempts to access information on other folders, such as public folders and/or Schedule+ Free/Busy information will fail.

Additional query words: IIS OWA NTLM exfaqold failed inbox

Keywords: kbfaq kbinfo KB175891

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