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 supports only alphanumeric and space characters for the offline address name. This OAB will not be generated.


This Error event indicates that Exchange was unable to successfully generate one or more offline address books (OABs). This failure occurs when the name of an OAB contains characters that are not valid. OAB names only support the use of alphanumeric and space characters.

User Action

To resolve this error, edit the names of any OABs so that they only include alphanumeric characters and space characters. For detailed instructions, see Configure Offline Address Book Properties.

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.