In Exchange 2010, I use below to clean up "recoverable items folder": Search-Mailbox -Identity "Administrator" -SearchDumpsterOnly -TargetMailbox "Discovery Search Mailbox" -TargetFolder "Administrator-RecoverableItems" -DeleteContent But it can't work in Exchange 2007, so is there any way to clean up the "recoverable items folder"? Thanks.

Hi, If I understand your question correctly I would answer that the items would be deleted when the deleted items retention period runs out. Leif

Leif, Thanks for replied. My work is use powershell to import PST file to Exchange, so it seems that set the deleted items retention to 0 does not work for this kind of message. - -! So is there any way to solve this problems? Thanks again. Catherine