Microsoft Exchange couldn’t start transport agents. The Microsoft Exchange Transport service will be stopped. Exception details: %1 : %2

Product: Exchange
Event ID: 16023
Source: MSExchangeTransport
Version: 8.0
Symbolic Name: CannotStartAgents
Message: Microsoft Exchange couldn’t start transport agents. The Microsoft Exchange Transport service will be stopped. Exception details: %1 : %2

This Error event indicates that some or all of the transport agents that are configured on this Microsoft Exchange Server 2007 server have not started. As a result, the Microsoft Exchange Transport service has been forced to stop. This Error event can only occur when the Microsoft Exchange Transport service is starting. The transport agent or transport agents that caused the error are included in Event 1052, which accompanies this Error event. The following are two of the reasons why these Error events occur:

  • The transport agent is not installed or configured correctly.

  • The Active Directory directory service is not available.

User Action

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

  1. Examine Event 1052 to determine which transport agent has caused the error.

  2. Check the transport agent documentation and verify its configuration.

  3. Uninstall and then reinstall the transport agent.

  4. If you can’t determine the cause of the failure, you can disable the transport agent to prevent it from loading when the Microsoft Exchange Transport service starts. Disabling the transport agent lets you start the Microsoft Exchange Transport service and restart mail flow. Be aware that if you disable a transport agent, the actions that the transport agent performed will not be applied to messages that pass through the affected server until the transport agent is re-enabled. To disable a transport agent, use the following command:

    Disable-TransportAgent <Name of transport agent>

If you experience mail flow interruptions or other problems in your Exchange environment after you try to resolve this issue, contact Microsoft Customer Support. For information about how to contact support, visit Microsoft Help and Support.

If you are not already doing so, consider running the tools that Microsoft Exchange offers to help administrators analyze and troubleshoot their Exchange environment. These tools can help you make sure that your configuration is in line with Microsoft best practices. They can also help you identify and resolve performance issues, improve mail flow, and better manage disaster recovery scenarios. Go to the Toolbox node of the Exchange Management Console to run these tools now. For more information about these tools, see Toolbox in the Exchange Server 2007 Help.


Leave a Reply