Topic Last Modified: 2010-03-08

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	2091
Event Source	MSExchange ADAccess
Alert Type	Warning
Rule Path	Microsoft Exchange Server/Exchange 2010/Common Components/Active Directory Access
Rule Name	The directory server specified in the registry wasn't found in the Sites container in Active Directory, so the AD Provider won't use this server.

Explanation

This Warning event indicates that a domain controller or a global catalog server specified in the Windows registry was not found by the Microsoft Exchange Active Directory Topology service. This event is caused when one or more of the following conditions are true:

The Active Directory Topology service cannot locate the domain that contains the DNS server.
The Active Directory Topology service cannot find the DNS name.
The Active Directory Topology service cannot find a writable Naming Context in Active Directory.
The Windows registry is configured to use an incorrect value. For example, the registry key or server name is not spelled correctly.

Important The specified domain controller or global catalog server will not be used until the next topology discovery.

User Action

If other Exchange services start without a problem, this warning can be ignored. However, it is recommended that you resolve this warning by doing one or more of the following:

Make sure that the registry key and the domain controller name mentioned in the event description are correctly specified in the Windows registry.
Make sure that the domain controller specified in the event description is correctly registered on the DNS server. Also make sure that its host name entries are valid. For more information about how to troubleshoot DNS issues, see DNS Troubleshooting.
In Active Directory Sites and Services, make sure that the domain controller specified in the event description is listed under the Sites container.
Check the Application log and System log on the domain controller mentioned in the event description for any corresponding Warning or Error events.

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.