The connection between the Client Access server and Mailbox server “%1” failed. If this event is logged infrequently or only during scheduled downtime for a Mailbox server, no user action is required. If this event occurs repeatedly, check network connectivity using PING or PingPath. Also, check connectivity using the Test-ActiveSyncConnectivity cmdlet. More information: %2

Details
Product: Exchange
Event ID: 1022
Source: MSExchange ActiveSync
Version: 8.0
Symbolic Name: ConnectionFailed
Message: The connection between the Client Access server and Mailbox server “%1” failed. If this event is logged infrequently or only during scheduled downtime for a Mailbox server, no user action is required. If this event occurs repeatedly, check network connectivity using PING or PingPath. Also, check connectivity using the Test-ActiveSyncConnectivity cmdlet. More information: %2
   
Explanation

This Warning event indicates that Exchange ActiveSync has temporarily detected a connection problem between the computer that is running the Mailbox server role and the computer that is running the Client Access server role. Exchange ActiveSync will retry ActiveSync operations between the Client Access server and the Mailbox server.

This event may be logged in the following conditions:

  • If there are network connectivity issues between the Mailbox server and the Client Access server.

  • If the Mailbox server is offline for any reason.

   
User Action

To resolve this event, consider the following:

  • If this event is infrequently logged, or only during scheduled downtime for a Mailbox server, no user action is required.

  • If this event frequently occurs, do one or more of the following:

    • Check network connectivity between the Mailbox server and the Client Access server. Use the Ping or PathPing command-line tools to test basic connectivity. Use Ping to isolate network hardware problems and incompatible configurations. Use PathPing to detect packet loss over multiple-hop trips. For more information, see Microsoft Knowledge Base article 325487, How to troubleshoot network connectivity problems.

    • Use the test-ActiveSyncConnectivity task. For information about how to use this command, see test-ActiveSyncConnectivity in the Microsoft® Exchange Server 2007 Help file.

    • Review the Application log on the Mailbox server to determine the root cause of the inability of the Client Access server to connect to the Mailbox server.

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.

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