Topic Last Modified: 2010-01-26

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:

From the Operations Console, double-click this alert, and then click the General tab. Review the description of the alert that includes the variables specific to your environment.
From the Operations Console, double-click this alert, and then click the Alert Context tab. Review the logged events that meet the criteria of this Operations Manager alert.

Details

Product Name	Exchange
Product Version	14.0 (Exchange 2010)
Event ID	4016
Event Source	MSExchange Availability
Alert Type	Error
Rule Path	Microsoft Exchange Server/Exchange 2010/Client Access/Availability Service
Rule Name	Invalid Account Credentials/Unable to Authenticate

Explanation

This Error event indicates that the Microsoft Exchange Availability service did not logon as a network service. The Exchange Availability service retrieves the Schedule+ Free Busy and Out-Of-Office (OOF) data for a set of mailboxes residing on a computer that is running Exchange Server 2007 or Exchange Server 2010. When the Exchange Availability service cannot directly connect to a mailbox that resides in a remote Active Directory forest, it sends a proxy Web request to another instance of the Exchange Availability service that is running in the remote Active Directory forest by using Kerberos authentication. If Kerberos authentication fails, Network LAN Manager (NTLM) authentication is used. Under NTLM authentication, the Web request for a cross-site or cross-forest Exchange Availability service that is running under the context of a local computer uses an Anonymous user account.

The cross-site or cross-forest Availability service cannot authenticate an incoming Web request that uses an Anonymous user account. Therefore, the cross-site or cross-forest Availability service must impersonate the network service context. This means that even under NTLM authentication, the Web request for cross-site or cross-forest Exchange Availability service uses a local computer account. This event is logged when the Exchange Availability service does not create the network service authentication context.

User Action

To resolve this error, contact Microsoft Product Support Services. For more information, visit the Microsoft Help and Support Web site.

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.