Topic Last Modified: 2010-04-27

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


Alert Type


Rule Path

Microsoft Exchange Server/Exchange 2010/Mailbox/System Attendant

Rule Name

An Active Directory search has failed. Cannot access schema information.


This Error event may be triggered by multiple causes. Similarly, the method by which you resolve this error varies greatly depending on what triggered this event in your particular Exchange environment. This Error event may be accompanied by MSExchangeSA error event 2035, or MSExchangeAL error events 8325, 8326 and 8231. This error is most often due to the absence of the address type object from the Configuration\Services\Microsoft Exchange\First Organization\Addressing\Address-Types container in Active Directory.

The %1 value will be replaced by the purported search string.

The %2 value will be replaced by the specific object in Active Directory.

The %3 value will be replaced by the specific error code.

The %4 value will be a link to Search the Support Knowledge Base (KB).

User Action

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

  • Review the System and Application event logs for related events. For example, events that occur immediately before and after this event may provide more information about the root cause of this error.

  • If the Application event log has MSExchangeSA Error event 2035, uninstall the third-party application referenced in the Error event. Exchange 2010 does not support third-party 32-bit applications and attempting to install them will result in failure because they do not include a 64-bit address generator.

  • Run the tools that Exchange offers to help administrators analyze and troubleshoot their Exchange organization. Open the Toolbox node of the Exchange Management Console to run these tools.

If you cannot resolve this error, or you experience other problems or mail flow interruptions in your Exchange environment after attempting to resolve this error, contact Microsoft Product Support. For information about contacting support, visit the Contact Us page of the Microsoft Help and Support Web site.

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.