Topic Last Modified: 2010-01-21

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

Transport found a connector with source servers belonging to multiple Active Directory sites. Transport only uses servers in site with least-cost route.


This Warning event indicates that a Microsoft Exchange Server 2010 Send connector or foreign connector has been configured to use source servers that are located in different Active Directory sites. When routing to this connector, the source Hub Transport server routes to the closest source server only. Configuring more than one source server for a connector provides load balancing. However, when the source servers are located in different Active Directory sites, load balancing across the source servers does not occur.

User Action

To resolve this error, do the following:

  • Modify the connector to specify source servers from only a single Active Directory site. You can also configure a connector with the same address space in each Active Directory site, specifying source servers from only the home Active Directory site. Load balancing will not occur across the connectors. If you do this, routing will always select the connector with the lowest cost, proximity, and finally the lowest alphanumeric name.

  • If the recommended steps do not resolve this error, contact Microsoft Customer Support Services. For more information about how to contact support, visit the Microsoft Help and Support Web site.

For More Information

To search the Microsoft Knowledge Base articles based on criteria that generated this alert, visit the Search the Support Knowledge Base (KB) 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.