MSExchange Availability 4018

This article provides an explanation and possible resolutions for a specific Exchange event. If you don't find what you’re looking for here, try searching Exchange 2010 Help.

Details

Explanation

This Error event indicates that a failure occurred while locating the Microsoft Exchange Client Access server that retrieves Schedule+ Free Busy information for the e-mail address specified in the event description. This event may occur for multiple reasons.

Note   This event occurs when the diagnostic logging level of Availability Service is set to Low. For more information about how to change diagnostic logging levels, see Change Logging Levels for Exchange Processes.

User Action

For more information about the root cause of this error, do one or more of the following:

• Increase the diagnostic logging level on the Availability Service and Availability Service General counter of the MSExchange Availability performance object. You can increase logging by running the following Exchange Management Shell commands:

  Set-EventLogLevel "MSExchange Availability\Availability Service" -Level High

  Set-EventLogLevel "MSExchange Availability\Availability Service General" -Level High

  For more information about increasing diagnostic logging levels, see Change Logging Levels for Exchange Processes.

• Review the Application event log for related events. Events that occur immediately before and after this event may provide more information about the root cause of this error.

Important After you have completed troubleshooting this issue, return logging to the default level by running the following commands:

Set-EventLogLevel "MSExchange Availability\\Availability Service" -Level Lowest

Set-EventLogLevel "MSExchange Availability\\Availability Service General" -Level Lowest

• If this event seems to be causing mail flow interruptions or other problems in the Exchange environment, contact Microsoft Product Support. For information about how to contact support, visit the Microsoft Help and Support Web site.

For More Information

If you are not already doing so, consider running the Exchange tools, which have been 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 and improve mail flow. 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.