Process %1 (PID=%2). Exchange Active Directory Provider has detected that the following Global Catalog servers in the local site ‘%3’ became reachable and is using them: %4

This Informational event indicates that the server running Microsoft® Exchange Server that logged this event will now use the global catalog servers in the local Active Directory® site. This event may occur if the global catalog servers specified in the event description are temporarily unavailable and Exchange Active Directory Provider is moved to a remote Active Directory site to access and cache the Active Directory information.

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Note  If you are not already doing so, consider running the tools that Microsoft Exchange offers to help administrators analyze and troubleshoot their Exchange environment. These tools can help you make sure that your configuration is in line with Microsoft best practices. They can also help you identify and resolve performance issues, improve mail flow, and better manage disaster recovery scenarios. Go to the Toolbox node of the Exchange Management Console to run these tools now. For more information about these tools, see Toolbox in the Exchange Server 2007 Help.