Topic Last Modified: 2010-01-27

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 ActiveSync

Alert Type


Rule Path

Microsoft Exchange Server/Exchange 2010/Client Access/ActiveSync

Rule Name

Exchange ActiveSync has encountered repeated failures with a mailbox server. The process will be postponed.


This Error event indicates that repeated failures occurred when Microsoft Exchange ActiveSync tried to access data on the computer that is running the Mailbox server role. Specifically, multiple unsuccessful mailbox requests/access occurred. Another symptom that you may find is that Exchange ActiveSync users report that it takes them more time than usual to synchronize their devices with the computer that is running Microsoft Exchange. This event may be logged if the mailbox server is overloaded. For example, this error may indicate that there are too many users on the mailbox server. It may also indicate that there are other performance issues with the mailbox server.

User Action

To resolve this error, consider the following:

  • If this event is infrequently logged, no user action is required.

  • If this event is frequently logged, do one or more of the following:

    • Consider decreasing the load on the mailbox server specified in the event description.

    • Review the Application log for other events that could indicate the root cause of performance problems on the mailbox server specified in the event description.

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.