Exchange 2010 Cannot delete Empty Database.

Error:
This mailbox database contains one or more mailboxes or arbitration mailboxes. To get a list of all mailboxes in this database, run the command Get-Mailbox -Database . To get a list of all arbitration mailboxes in this database, run the command Get-Mailbox -Database -Arbitration. To disable a non-arbitration mailbox so that you can delete the mailbox database, run the command Disable-Mailbox . Arbitration mailboxes should be moved to another server; run the command Move-Mailbox -Arbitration -TargetDatabase . To remove the arbitration mailbox if this is the last server in the organization, run the command Remove-Mailbox -Arbitration -RemoveLastArbitrationMailboxAllowed.

Resolution
Get-Mailbox -Database ‘Database ID’
Get-Mailbox -Database ‘Database ID’ -Arbitration | ft -wrap -auto

Move-Mailbox “SystemMailbox{1f05a927-3be2-4fb9-aa03-b59fe3b56f4c}” -Arbitration -TargetDatabase ANOTHERDATABASE
or
Remove-Mailbox “SystemMailbox{1f05a927-3be2-4fb9-aa03-b59fe3b56f4c}” -Arbitration -TargetDatabase ANOTHERDATABASE