Количество п\я в каждой базе Exchange 2007

Get-MailboxDatabase | Select Server, StorageGroupName, Name, ProhibitSendReceiveQuota, @{Name="Number Of Mailboxes";expression={(Get-Mailbox -Database $_.Identity | Measure-Object).Count}} | Format-Table -AutoSize

http://teknologist.net/2011/find-number-of-mailboxes-per-database-with-powershell/