|Message:||Process %1 (PID=%2). Exchange Active Directory Provider could not find an available domain controller in domain %3. This event may be caused by network connectivity issues or configured incorrectly DNS server. This event may also occur if you have not configured correctly your multiple Active Directory sites.|
This Error event indicates that all domain controllers in the domain specified in the event description are down or unreachable. This event may occur for one or more of the following reasons:
To resolve this error, perform one or more of the following steps:
Note If you aren’t already doing so, consider running the tools that 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 mailflow, and better manage disaster-recovery scenarios. Go to the Toolbox node of Exchange Management Console to run these tools now. For more information about these tools, see Toolbox in the Exchange Server 2007 Help.