Exchange is unable to dismount the database that you specified
OPERATION Failed Error: Exchange is unable to dismount the database that you specified. Specified database: EMAILSERVER3\OPERATION\OPERATION; Error code: MapiExceptionBusy: Unable to unmount database. (hr=0x8004010b, ec=-2147221237) .
February 16th, 2010 5:39am

Hi,Make sure Exchange System Attendant Service is running. Regards from www.windowsadmin.info
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February 16th, 2010 7:28am

Exchange 2007 System Attendant is running, and so are all the exchange services
February 16th, 2010 3:10pm

Hi,Try to run this command: Test-ServiceHealth through Management Shell and ensure that the services are running fine Regards from www.windowsadmin.info
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February 16th, 2010 3:23pm

When I have seen this issue in the past it is because something is calling this database. If this is a cluster you can try to failover the resources to the other node. If it is not a cluster you can try to reboot the server or run process explorer and see what has handles into store.exe. Check out our blogs at http://cbfive.com/blog Chris cbfive.com
February 16th, 2010 5:27pm

Hi,Any updates?And please provide more information about your question. Organization? Exchange Server?And is there any error events in the Event Viewer?Have you try to restart the information store service or the server?Frank Wang
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February 18th, 2010 9:40am

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