Topic Last Modified: 2010-08-11

The Microsoft Exchange Server 2010 Management Pack for System Center Operations Manager includes a performance data collection engine that is used to query performance counter objects on computers running Exchange 2010. For this Operations Manager rule, data is collected by using the performance counter specified in the Details table.

To review the value of the performance counter that generated this alert, in Operations Manager, double-click this alert, and then click the General tab. Review the description of the alert that includes the variables specific to your environment.


Product Name


Product Version

14.0 (Exchange 2010)

Object Name

MSExchange Mail Submission

Counter Name

Hub Transport Servers Percent Active

Instance Name


Sample Interval


Server Role

Ex14. Edge Transport

Rule Path

Microsoft Exchange Server/Exchange 2010/Mailbox/Mail Submission

Rule Name

Percent of Active Hub Servers over last 10 minutes - Yellow(<50) - Edge Server.


This event indicates that fewer than 50 percent of active Hub Transport servers have been available over a 10-minute period. This scenario indicates that a new issue may be affecting the availability of Hub Transport servers in the Exchange organization.

This event may be triggered when one of the following conditions is true:

  • The affected Hub Transport servers are temporarily unavailable

  • The affected Hub Transport servers are offline

Additional troubleshooting may be required to determine whether this issue occurs because of a transient issue or whether the servers are actually offline.

User Action

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

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

  • Log on to the server, and then start Windows Reliability and Performance Monitor. Add all performance counters for the MSExchangeMailSubmission object. Then, note the values in the Hub Servers and Hub Servers In Retry entries.

  • 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.