Outbound direct trust authentication failed for certificate %1. The target IP address of the Exchange server that Microsoft Exchange tried to authenticate to is [%2]. Make sure EdgeSync is running properly.

Details
Product: Exchange
Event ID: 2018
Source: MSExchangeTransport
Version: 8.0
Symbolic Name: SmtpSendDirectTrustFailed
Message: Outbound direct trust authentication failed for certificate %1. The target IP address of the Exchange server that Microsoft Exchange tried to authenticate to is [%2]. Make sure EdgeSync is running properly.
   
Explanation

This Error event indicates that direct trust authentication failed for the specified certificate. The IP address of the server where the authentication attempt failed is provided in the error message. Direct trust authentication is used between Microsoft Exchange Server 2007 transport servers in the same organization.

   
User Action

To resolve this error, do one or more of the following:

  • Verify that the Edge Transport server is receiving synchronization updates from the Microsoft Exchange EdgeSync service. You can use the Test-EdgeSynchronization cmdlet in the Exchange Management Shell on a Hub Transport server to verify EdgeSync results. For more information, see Test-EdgeSynchronization.

  • Review other related Error and Warning events in the Application log. These related events may help you find the root cause of this error.

  • 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.

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.

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