get-mailbox -ResultSize Unlimited | Get-MailboxStatistics | where {$_.TotalItemSize -ge "4GB"} | Select-Object @{Name="DisplayName1";Expression={Get-Mailbox $_ | select -ExpandProperty SamAccountName}}, TotalItemSize, ItemCount, Database, TotalDeletedItemSize,DeletedItemCount, LastLoggedOnUserAccount, LastLogonTime, LastLogoffTime