Topic Last Modified: 2010-04-29

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

System Attendant detected that the local computer is not a member of the group.


This Warning event indicates that the Microsoft Exchange System Attendant service could not find the Exchange server in the Exchange Servers security group. Other symptoms you may experience when this event occurs are the presence of event ID 9187, and the inability to start the Microsoft Exchange System Attendant service and any services that depend on it.

This event may be caused if the distinguished name of the Exchange server has been changed. When the Microsoft Exchange System Attendant starts, it caches the distinguished name of the local computer. If the distinguished name of the Exchange server is changed, for example by moving it from one organizational unit to another organizational unit, the new distinguished name will be different from the distinguished name that is in the cache. This will cause the Microsoft Exchange System Attendant to log event ID 9186 and 9187 messages.

User Action

To resolve this issue, do one of the following:

  • If your Exchange server is listed in the Exchange Servers security group, restart the Microsoft Exchange System Attendant to refresh the cached value.

  • If your Exchange server is not listed in the Exchange Servers security group, follow these steps:

    1. Remove the Exchange server account from the Exchange Servers group.

    2. Add the Exchange server account back to the Exchange Servers group.

    3. Restart the Microsoft Exchange System Attendant service.

  • If you are having difficulty resolving the issue, 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.