Topic Last Modified: 2010-04-28

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

Unable to generate the e-mail address; the address type is not valid.


This Error event indicates that the System Attendant found the proxy address type was invalid and could not generate an e-mail address of this type. This error will occur one time for each object the System Attendant tries to process. This error typically occurs when an address type has been corrupted. The address types are found in the Configuration context of Active Directory under Services/Microsoft Exchange/<Organization>/Addressing/Address-Types. You can use an Active Directory tool such as ADSI Edit to access the Address-Types container.

User Action

To resolve this error, follow one or more of these steps:

  • If the address type is for third-party software, contact the software vendor.

  • If the address type is for one of the standard address types, such as SMTP and X.400, contact Microsoft Product Support Services. For information about how to contact support, visit Microsoft Help and Support.

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.