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

ID: Q198509

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 :
Version : WINDOWS:5.0,5.5,5.5SP1; WINNT:1.0,2.0
Platform : WINDOWS
Issue type : kbprb