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 ADAccess

Alert Type


Rule Path

Microsoft Exchange Server/Exchange 2010/Common Components/Active Directory Access

Rule Name

Site monitor failed to start.


This Error event indicates that the Site monitor API was unable to start when it tried to discover the site name for the server that is running Microsoft Exchange Server. The Site monitor API discovers the site name where the Exchange server is installed. It also updates the msExchServerSite attribute of the Exchange server object when the local site name changes.

This event may be caused by the following circumstances:

  • There is insufficient virtual memory on the Exchange server.

  • The Site monitor API experiences problems when it tries to monitor the site name. The site monitor API tries to monitor the site name every 15 minutes.

User Action

To resolve this error, do one or more of the following:

  • Restart the Exchange server.

  • Review the Application log and System log for any corresponding Warning or Error events.

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.