DOCUMENT:Q198509 16-APR-1999 [exchange] TITLE :XWEB: "Unable to get your inbox" Using OWA via Proxy Server PRODUCT :Microsoft Exchange PROD/VER:WINDOWS:5.0,5.5,5.5SP1; WINNT:1.0,2.0 OPER/SYS: KEYWORDS: ====================================================================== ------------------------------------------------------------------------------- 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 ------------------------------------------------------------------------------- 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 ====================================================================== 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 ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 1999.