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Q198509: XWEB: "Unable to get your inbox" Using OWA via Proxy Server

Article: Q198509
Product(s): Microsoft Exchange
Version(s): WINDOWS:5.0,5.5,5.5SP1; WINNT:1.0,2.0
Operating System(s): 
Keyword(s): 
Last Modified: 16-APR-1999

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The information in this article applies to:

- Microsoft Exchange Active Server Components, version 5.0 
- Microsoft Outlook Web Access, version 5.5 
- Microsoft Outlook Web Access, version 5.5 Service Pack 1 
- Microsoft Proxy Server versions 1.0, 2.0 
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SYMPTOMS
========

When accessing an Outlook Web Access (OWA) server using Windows NT
Challenge/Response (NTLM) authentication on the Exchange virtual directory in
Microsoft Internet Information Server (IIS) through a Microsoft Proxy Server,
you may get the following error:

  OWA was unable to get your Inbox.

CAUSE
=====

NTLM is not supported through Proxy Server because NTLM requires a persistent
connection.

WORKAROUND
==========

To work around this problem, turn NTLM authentication off on the Exchange
Virtual Web in IIS, and set permissions to Basic Clear Text.

MORE INFORMATION
================

For additional information, please see the following articles in the Microsoft
Knowledge Base:

  Q175805 PRB: "Access Is Denied" Error When Expecting Logon Dialog

  Q183730 HTML Administrator Doesn't Work Through Proxy with NTLM

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Keywords          :  
Technology        : kbOutlookSearch kbAudDeveloper kbZNotKeyword6 kbExchangeSearch kbProxyServ100 kbZNotKeyword2 kbProxyServSearch kbOWASearch kbOWA550 kbOWA550SP1 kbProxyServ200 kbExchangeActiveServComp500
Version           : WINDOWS:5.0,5.5,5.5SP1; WINNT:1.0,2.0
Issue type        : kbprb

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