Process %1 (PID=%2). Failed to connect to remote server %3. The remote server may be down, or its Server service may not be running.

This Warning event indicates that the Microsoft Exchange File Distribution service could not connect to the remote server specified in the event description. The File Distribution service synchronizes offline address book files between Exchange servers that have the Mailbox server role and the Client Access (CAS) server role installed, and where the Mailbox server is using the ExchangeOAB file share. This event may occur if the ExchangeOAB file share is not available or the server that has ExchangeOAB file share is down.

To resolve this Warning event, follow these steps:

• Make sure that the remote server specified in the event description is working correctly. You can also use the Ping or PathPing command-line tools to test basic connectivity. For more information, see Microsoft Knowledge Base article 325487, How to troubleshoot network connectivity problems.

• Make sure that the Windows Server service on the specified remote server is running. You can use Windows Services console to verify this step.

• Make sure that ExchangeOAB file share on the specified remote server can be accessed from the Exchange server that logged this event.

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

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.