Hi, We have recently migrated from 2007 to 2010 and after a few minor issues we are happily running on 2010 exclusively. I am now at the "clean up" phase and I want to remove the default database that gets automatically created when 2010 is installed, ours is called "Mailbox Database 1139482114". Now, when I attempt to remove the DB I get this ugly message: "-------------------------------------------------------- Microsoft Exchange Error -------------------------------------------------------- The mailbox database 'Mailbox Database 1139482114' cannot be deleted. Mailbox Database 1139482114 Failed Error: This mailbox database contains one or more mailboxes, mailbox plans, archive mailboxes, or arbitration mailboxes. To get a list of all mailboxes in this database, run the command Get-Mailbox -Database <Database ID>. To get a list of all mailbox plans in this database, run the command Get-MailboxPlan. To get a list of archive mailboxes in this database, run the command Get-Mailbox -Database <Database ID> -Archive. To get a list of all arbitration mailboxes in this database, run the command Get-Mailbox -Database <Database ID> -Arbitration. To disable a non-arbitration mailbox so that you can delete the mailbox database, run the command Disable-Mailbox <Mailbox ID>. To disable an archive mailbox so you can delete the mailbox database, run the command Disable-Mailbox <Mailbox ID> -Archive. Arbitration mailboxes should be moved to another server; to do this, run the command New-MoveRequest <parameters>. If this is the last server in the organization, run the command Disable-Mailbox <Mailbox ID> -Arbitration -DisableLastArbitrationMailboxAllowed to disable the arbitration mailbox. Mailbox plans should be moved to another server; to do this, run the command Set-MailboxPlan <MailboxPlan ID> -Database <Database ID>." So I googled it and found this informative page, http://muc-ug.org.in/index.php/how-to/exchange-2010/94-default-mailbox-database-a-move-arbitration-mailboxes.html, which talked about arbitration mailboxes and the like. As I followed the steps it had everything the blog spoke of and when it came time to remove the DB after moving the mailboxes I still get the same original error. So I thought that maybe the issue was that in the steps when moving the mailboxes I never specified a target database to move to so I retried the moves this time specifying a target DB but alas still the same error appears and now I do see the mailboxes in "Disconnected Mailbox". After retrying the moves with the target database specified I now see multiples of the mailboxes in "Disconnected Mailbox". How do I resolve this issue? I am happy to send screenshots to assist with describing my problem.

Hi, You needs to connect to the root domain controller to move arbitration mailbox. For Ex: Get-Mailbox -Arbitration -DomainController 'hostname' | New-MoveRequest -TargetDatabase 'dbname' -DomainController 'hostname' Here you can see that, I used host name instead of DC FQDN Regards from www.windowsadmin.info

Hi, Thank you for your super quick reply, there was actually one more mailbox that wasn't moved over, "Discovery Search Mailbox", that when I moved over via the EMC I was then able to completely remove the DB. And when I looked in the "Disconnected Mailbox" bucket I saw the three original mailboxes disappeared, BUT there are two mailboxes still there from the 2nd move attempt that I made by specifying the target DB. Will these eventually disappear or is there more work I need to do? Should I still run your command: Get-Mailbox -Arbitration -DomainController 'hostname' | New-MoveRequest -TargetDatabase 'dbname' -DomainController 'hostname' Or should I wait? What's your advice?

You may try Clean-MailboxDatabase cmdlet to remove them completely Eg. Clean-MailboxDatabase 'dbname'Regards from www.windowsadmin.info

Hi, I've tried that but the objects still exist, however since the originals disappeared from the window I am happy that these are objects that can be removed so I will be removing them via the PowerShell. Thank you for your help.