I am using this PowerShell command to try and delete emails from our Exchange Journal,
[PS] C:\Windows\system32>Search-Mailbox -Identity exchangejournal -SearchQuery "Received:12/31/2012..06/30/2013" -DeleteContent
It says it is successful, but it shows ResultItemsCount: 0 and ResultItemsSize: 0 B <0 bytes>. But if I log into that mailbox there are emails from that date. Any suggestions as to what I may be doing wrong?