執行 Exchange Management Shell ( ExchangePowerShell )
Get-Mailbox -ResultSize Unlimited | Get-MailboxStatistics | Sort-Object TotalItemSize -Descending | Select-Object DisplayName,TotalItemSize,DatabaseName -First 30
TotalItemSize to TotalItemSizeGB
@{Name="TotalItemSizeGB";Expression={$_.TotalItemSize.Value.ToGB()}}