http://www.solutionsense.de/blog/2012-06-20-exchange-2010-whitespace.php
1. Get-MailboxDatabase -Status | ft name,databasesize,availablenewmailboxspace -auto
2. Dismount-Database EXCHANGE-DB-01
3. cd E:\Mailbox\
4. „eseutil /d EXCHANGE-DB-01.edb /t\\TEMP-STORAGE-SERVER\FREIGABE\Temp-EXCHANGE-DB-01.edb“
5.Mount-Database EXCHANGE-DB-01