Microsoft KB Archive/250667

= XWEB: Mailbox Access Through OWA Is Denied when Proxy Server Is in a Separate Domain =

PSS ID Number: 250667

Article Last Modified on 10/23/2003

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The information in this article applies to:


 * Microsoft Outlook Web Access 5.5
 * Microsoft Exchange Server 5.5

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This article was previously published under Q250667



SYMPTOMS
When you access a mailbox by using Outlook Web Access (OWA) through a proxy server that is in a separate domain from your Exchange Server computer, one of the following error messages may be displayed:

Failed to get Inbox.

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OWA was unable to get your Inbox.

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Access is Denied.



CAUSE
This problem may be caused by one or both of the following conditions:
 * The minimum one-way trust required between the two domains does not exist. (The domain of the proxy server must trust the users in the domain of the Exchange Server computer.)
 * A group of users from the domain of the Exchange Server computer has not been given rights on the proxy server to access the computer from the network or to log on locally.



RESOLUTION
Create a trust relationship if one does not already exist. You must configure the domain of the proxy server as the trusting domain and the domain of the Exchange Server computer as the trusted domain.

For more information about how to set up trust relationships, please refer to the Windows NT administrator documentation.

After you create a trust relationship, grant a group of users from the domain of the Exchange Server computer rights on the proxy server to access the computer from the network and to log on locally. To do this, perform the following steps:
 * 1) Create a global group in the domain of the Exchange Server computer, and then add all of the OWA users to the global group.
 * 2) Create a local group in the domain of the proxy server, on the proxy server.
 * 3) Add the global group from the domain of the Exchange Server computer to the local group in the domain of the proxy server.
 * 4) On the proxy server, assign the new local group rights to access the computer from the network and rights to log on locally.



MORE INFORMATION
Microsoft Proxy Server version 2.0 implements the Web Proxy service by using an Internet Server API (ISAPI) filter that loads under the context of the default Web site on the proxy server. Because of this, the same considerations that apply to security configuration on an Outlook Web Access server also apply to the security configuration on the proxy server.

For additional information, click the article numbers below to view the articles in the Microsoft Knowledge Base:

248486 XCCC: Mailbox Access Across Domains Is Denied Through OWA

173470 XCLN: Troubleshooting Failed to get Inbox Error Message

175892 XWEB: Permissions Required for Outlook Web Access

For more information about how to correctly configure Outlook Web Access, please see the Troubleshooting Guide for Outlook Web Access at the following Microsoft Web site:

http://support.microsoft.com/support/exchange/content/whitepapers/owa_tshoot.asp

Additional query words: OWA external internet

Keywords: kbprb KB250667

Technology: kbExchange550 kbExchangeSearch kbOutlookSearch kbOWA550 kbZNotKeyword2

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