MSExchangeTransport 5021

This article provides an explanation and possible resolutions for a specific Exchange event. If you don't find what you’re looking for here, try searching Exchange 2010 Help.

Details

Explanation

This Error event indicates that the referenced routing tables show that a Microsoft Exchange 2000 Server or Exchange Server 2003 server is a member of the Exchange Server 2007 routing group. This configuration is not supported. For more information, see Coexisting with Exchange Server 2003 and Exchange 2000 Server.

User Action

To resolve this error, do the following:

• Move the Exchange 2000 server or Exchange 2003 server to an Exchange 2000 or Exchange 2003 routing group. If no Exchange 2000 or Exchange 2003 routing group is available, you must use the Exchange 2000 or Exchange 2003 Exchange System Manager to create a routing group and then locate the server in that routing group. You also have to create a routing group connector between the Exchange 2007 routing group and the Exchange 2000 or Exchange 2003 routing group.

• 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

If you are not already doing so, consider running the Exchange tools, which have been 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 and improve mail flow. 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.