Topic Last Modified: 2010-05-03

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

OABGen received an error while trying to delete one of the offline address book files from the distribution point.


This Warning event indicates that the offline address book (OAB) generation (OABGen) failed to delete the previous version of the files from the OAB distribution point.

User Action

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

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

  • If this event has been logged more than once for the same file, check the file permissions in the OAB distribution point. To locate the file path location for the OAB distribution point, run the Exchange Management Shell cmdlet Get-OABVirtualDirectory.

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.