Topic Last Modified: 2010-07-12

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


Rule Path

Microsoft Exchange Server/Exchange 2010/Mailbox/Mailbox on Database Copy

Rule Name

The Exchange store can't create any more MAPI-named properties.


This Error event indicates that a user could not add a new MAPI named property because the number of MAPI-named properties has reached the configured limit. Review the event description for information that is specific to your environment.

The configured default limit is 16 x 1024 (16 kilobytes). This limit is set to reduce the ability of a malicious application to make the database inoperative by exhausting the 32 kilobytes available for MAPI named properties.

User Action

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

  • Review the Application event log for this event to determine which specific applications are trying to exceed the maximum quota.

  • For more information about this limit and how to increase the value, review Microsoft Knowledge Base article 820379, How to configure quota settings for named properties and for replica identifiers in Exchange Server 2003 and in Exchange Server 2007. Be aware that the maximum value is 32 KB.

    Note   Named Props Quota is the registry value for MAPI named properties.

  • 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.