Topic Last Modified: 2010-02-18

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/Common Components/Hub Transport and Edge Transport/Transport

Rule Name

Exchange was unable to delete the Routing Table log file.


This Error event indicates that the Microsoft Exchange Transport service couldn't remove the specified routing table log file from the routing table log directory.

Routing table logging periodically records a snapshot of the routing table that is used by the Microsoft Exchange Server 2010 Hub Transport server or Edge Transport server to route messages to their destinations.

The location of the routing table logs is controlled by the RoutingTableLogPath parameter on the Set-TransportServer cmdlet in the Exchange Management Shell. By default, the routing table logs are stored in the C:\Program Files\Microsoft\Exchange Server\V14\TransportRoles\Logs\Routing directory. The following permissions are required on the routing table log directory:

  • Administrator: Full Control

  • System: Full Control

  • Network Service: Read, Write, and Delete Subfolders and Files

Circular logging deletes the oldest routing table log files if either of the following conditions is true:

  • The routing table log directory reaches its specified maximum size. The size is controlled by the RoutingTableLogMaxDirectorySize parameter on the Set-TransportServer cmdlet in the Exchange Management Shell. The default value is 50 MB.

  • A routing table log file reaches its specified maximum age. The size is controlled by the RoutingTableLogMaxAge parameter on the Set-TransportServer cmdlet in the Exchange Management Shell. The default value is 7 days.

User Action

To resolve this error, do the following:

  • Verify that the location that is specified by the RoutingTableLogPath parameter on the Get-TransportServer cmdlet exists and has the correct permissions assigned to it.

  • Verify that no other active process has opened the specified routing table log file. Likely candidates are file-based antivirus software or backup software.

For more information, see the following topics:

  • Configure Routing Table Logging

  • Set-TransportServer

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.