You cannot log on to Outlook Web Access in an Exchange Server 2007 environment, and you receive an error message: "HTTP Error 403.4"

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In a Microsoft Exchange Server 2007 environment, you use a third-party Secure Sockets Layer (SSL) offloader. In this case, you cannot log on to Microsoft Office Outlook Web Access 2007 when you use the following link:
Additionally, you may see an "HTTP Error 403.4" error message on the Web page when you try to use that link. However, you can successfully log on to Outlook Web Access if you add a slash mark character (/) to the end of the link, as in the following example:
This problem occurs because SSL offloading should respond to all links as HTTPS protocol requests. However, SSL offloading does not respond to links as HTTPS protocol requests on the logon page. Instead, SSL offloading redirects users who try to connect by using a link that ends with "/owa" to the HTTP protocol (http://).

Update information

To resolve this problem, download and install Update Rollup 3 for Exchange 2007 Service Pack 1. For more information about Update Rollup 3 for Exchange Server 2007 Service Pack 1, see the following Exchange Help topic: For more information about how to obtain the latest Exchange service pack or update rollup, see the following Exchange Help topic:
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about SSL offloading, visit the following Microsoft TechNet Web site:

Article ID: 945453 - Last Review: 01/16/2015 02:15:36 - Revision: 1.1

Microsoft Exchange Server 2007 Enterprise Edition, Microsoft Exchange Server 2007 Standard Edition

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