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Resolve for Microsoft Exchange Server Error in ‘/’ Application

When running Microsoft Exchange Server, users often confront certain error messages that hamper the glibness of the work flow. Consider a situation when an Exchange 2007 user installs Windows SBS 2008 he finds that OWA shows unexpected behavior.

To overcome the problem, the user looks over the SBX web application website in IIS and observes the following error:

“Server error in ‘/’ Application.
Object reference not set to an instance of an object.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.”


To resolve the issue, effective solution for Exchange Server Recovery is necessitated. For this one must uninstall CAS role and remove IIS. Then, reinstall IIS and CAS role. It is however, important to keep in mind that uninstall of IIS will impact the services associated with it. Therefore, it is advised to carry out the same by bringing down Exchange Server first. This should not be attempted onto a running Exchange Server.

Once the reinstall takes place, the Exchange Virtual Directory is restored. Directories other than Exchange need to be restored manually. To do this, back up all existing directories prior to carrying out the aforementioned resolve and restore them once the process of Microsoft Exchange Server Recovery is complete.

In some cases after reinstalling IIS and CAS role, the user encounters another error when launching OWA:

“Your session has times out. To protect your computer from unauthorized access…”

When this happens, the first step towards solution is to set Maximum Work Processes to 1, under IIS> Application Pools. If it is already set to 1, then it is required to disable ASP.NET.Impersonation. If none of the solutions for MS Exchange Server Recovery seem to be of help, then, look for third party Exchange Database Repair tools.

Stellar Phoenix Mailbox Exchange Server Recovery” is amongst the finest applications for Exchange Database Repair that is compatible with all major versions of MS Exchange Server including: 2010, 2007, 2003, 2000 and 5.5. The software comes with advanced scanning mode that can rid your Exchange Server of any error. The demo version of the application is available for free download from the respective website. The user interface of this effective Exchange Server Recovery tool is quite comprehensive.

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