Clustered Mailbox Server: %2Physical Server: %3StorageGroup %1 will be automatically mounted with the following loss information:* The last log generated (known to the physical machine) before the move operation or failover was: %4* The last log successfully replicated to the passive node was: %5* The “Auto Database Mount Dial” is set to: %6Attempts to copy to the last logs from the active node were not successful. Error code: %7.

Details
Product: Exchange
Event ID: 2091
Source: MSExchangeRepl
Version: 8.0
Symbolic Name: AutoMountReportMountWithDataLoss
Message: Clustered Mailbox Server: %2Physical Server: %3StorageGroup %1 will be automatically mounted with the following loss information:* The last log generated (known to the physical machine) before the move operation or failover was: %4* The last log successfully replicated to the passive node was: %5* The “Auto Database Mount Dial” is set to: %6Attempts to copy to the last logs from the active node were not successful. Error code: %7.
   
Explanation

The Warning event indicates that a failover occurred in a cluster continuous replication (CCR) environment where the clustered mailbox server failed over to the passive node with some data loss. The event provides specific details about the missing log files. The event indicates that the replication service could not successfully copy the last log files from the failed active node.

CCR provides an attribute for Mailbox servers that you can use to control unscheduled outage recovery behavior. The AutoDatabaseMountDial attribute has three possible values: Lossless, Good availability, and Best availability. The event message will indicate what value the AutoDatabaseMountDial attribute is set to.

For more information about AutoDatabaseMountDial attributes, see Scheduled and Unscheduled Outages.

   
User Action

To resolve the warning, reseed the passive node. For more information, see How to Seed a Cluster Continuous Replication Copy.

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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