%1 (%2) %3Attempted to attach database ‘%4’ but it is a database restored from a backup set on which hard recovery was not started or did not complete successfully.

This Warning event indicates that an online restore of an Exchange store database has been performed but hard recovery was never run or hard recovery failed to complete. For more information about this event, see Microsoft Knowledge Base article 810199, Event 619 is logged after an online restore operation of an Exchange Information Store database is performed.

To resolve this warning, perform a hard recovery on this database by running eseutil /cc from the directory where the Restore.env file exists. If you run eseutil /cc /t, then only the log files listed inside the Restore.env file will be replayed. Use eseutil /cm to view the information in the Restore.env file.

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.