List Datastore Folder Sizes

List Folder Sizes

In the Exchange Powershell:

Get-MailboxStatistics -database 3rdmailboxdatabase | where {$_.ObjectClass -eq "Mailbox"} | Sort-Object TotalItemSize | ft displayname,totalitemsize

You have to specify the database. (Or at least I did. I have more than one database, perhaps if you only have one it won't insist you specify.)

That's one long line of command there, so beware the scroll bar.