In the Exchange Powershell-based Console Management :
Get-Mailbox -Database "[Database ID]" -Arbitration | Remove-Mailbox -Arbitration -RemoveLastArbitrationMailboxAllowed
Random tech stuff
In the Exchange Powershell-based Console Management :
Get-Mailbox -Database "[Database ID]" -Arbitration | Remove-Mailbox -Arbitration -RemoveLastArbitrationMailboxAllowed
dsquery user [LDAP Path to the OU] | dsmod user -hmdir [new homedir] -profile [new profile path]