Topic Last Modified: 2010-09-08

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

MSExchange Message Security

Alert Type


Rule Path

Microsoft Exchange Server/Exchange 2010/Edge Transport/Message Security

Rule Name

Couldn't decrypt EdgeSync credentials. Please unsubscribe and then resubscribe your Edge Transport server.


This Error event indicates that the public key that is used to decrypt the Active Directory Lightweight Directory Services (AD LDS) credentials that are used during the EdgeSync process is unavailable or is invalid.

User Action

To resolve this error, do the following:

  • Remove the Edge Subscription from the Hub Transport server by using the remove-EdgeSubscription cmdlet in the Exchange Management Shell. After you have removed the Edge Subscription from the Exchange organization, resubscribe the Edge Transport server by using the new-EdgeSubscription cmdlet. This process will generate new credentials. For more information, see the following topics:

    • Remove-EdgeSubscription

    • New-EdgeSubscription

    • Understanding Edge Subscriptions

  • Review the Application log and System log on your Exchange 2010 servers for related events. For example, events that occur immediately before and after this event may provide more information about the root cause of this error.

  • Review the Operations Console in Operations Manager for detailed information about the cause of this problem. For more information, see the "Introduction" section in this article.

  • Resolve your issue by using self-support options, assisted support options, and other resources. You can access these resources from the Exchange Server Solutions Center. From this page, click Self-Support Options in the navigation pane to use self-help options. Self-help options include searching the Microsoft Knowledge Base, posting a question at the Exchange Server forums, and others. Alternatively, in the navigation pane, you can click Assisted Support Options to contact a Microsoft support professional. Because your organization may have a specific procedure for directly contacting Microsoft Technical Support, be sure to review your organization's guidelines first.

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.