Topic Last Modified: 2010-01-25

The Microsoft Exchange Server 2010 Management Pack for System Center Operations Manager monitors the Windows Application log on computers running Exchange 2010 and generates this alert when the events specified in the following Details table are logged.

To learn more about this alert, in Operations Manager, do one or more of the following:


Product Name


Product Version

14.0 (Exchange 2010)

Event ID


Event Source

MSExchange OWA

Rule Path

Microsoft Exchange Server/Exchange 2010/Client Access/Outlook Web Access

Rule Name

Outlook Web App failed to initialize. No default theme was found. Review MSExchangeOWA event 26 for the cause.


This Error event indicates that Microsoft Office Outlook Web App did not initialize because the Outlook Web App base themes folder referenced in the event description does not exist. The base folder contains images and cascading style sheets that are used to control the default appearance of Outlook Web App for your organization. The base folder is also used by other custom Outlook Web App themes if they are installed. By default, the base folder is located in C:\Program Files\Microsoft\Exchange Server\ClientAccess\Owa\<version>\themes\.

User Action

  • To resolve the error, replace the themes folder and the default subfolders with the files and folders that are located on the Exchange Server 2010 DVD. By default, those files and folders are located in the \Setup\ServerRoles\ClientAccess\owa\<version>\ folder of the Exchange 2010 DVD.

  • Contact a Microsoft Support professional to resolve this issue. To contact a Microsoft Support professional, visit the Exchange Server Solutions Center. In the navigation pane, click Assisted Support Options and use one of the assisted support options to contact a Microsoft Support professional. Because your organization may have a specific procedure for directly contacting Microsoft Technical Support, be sure to review your organization's guidelines first.

For More Information

If you are not already doing so, consider running the Exchange tools created to help you analyze and troubleshoot your Exchange environment. These tools can help make sure that your configuration aligns with Microsoft best practices. They can also help you identify and resolve performance issues, improve mail flow, and better manage disaster recovery scenarios. To run these tools, go to the Toolbox node of the Exchange Management Console. To learn more about these tools, see Managing Tools in the Toolbox.