FIX: OWA cannot be accessed after you upgrade Exchange Server 2013

After you upgrade Microsoft Exchange Server 2013 on a server that is running Windows 2012 or Windows 2012 R2, Outlook Web App (OWA) cannot be accessed. Additionally, you receive the following error message:

Error: "Could not load file or assembly 'AntiXSSLibrary
Error: "Could not load file or assembly 'AntiXSSLibrary, Version=, Culture=neutral, PublicKeyToken=d127efab8a9c114f' or one of its dependencies"

When you check the Application log, you find entries that resemble the following:

Log Name: ApplicationSource: ASP.NET 4.0.30319.0Date: date timeEvent ID: 1310Task Category: Web Eventvel: Warningvel: WarningEvent code: 3008 Event message: A configuration error has occurred.

When you try to browse any of the Exchange Back End Website virtual directories, you receive the following error message:

Page cannot be displayed

This issue occurs if the upgrade post-setup process is not run for the Client Access role. In this situation, the "SharedWebConfig" file is missing on following path:

//%ExchangeInstallDir%Program Files\Microsoft\Exchange Server\V15\ClientAccess

To fix this issue, install Cumulative Update 11 for Exchange Server 2013.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
Learn about the terminology that Microsoft uses to describe software updates.

Article ID: 2968265 - Last Review: 12/15/2015 17:41:00 - Revision: 5.0

Microsoft Exchange Server 2013 Enterprise

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