Powershell Script to get Top Mailboxes by Size

Get-Mailbox -database DB100 | Get-MailboxStatistics | Sort-Object TotalItemSize -descending |Select-Object DisplayName,ItemCount,@{name="MailboxSize";exp={$_.totalitemsize}} -first 10 | Convertto-Html | out-File report.htm

Exchange 2010 & PowerShell » Blog Archive » Powershell Script to get Top Mailboxes by Size:

http://www.myexchangeworld.com/2011/01/powershell-script-to-get-top-mailboxes-by-size/