List files before 10/4/2010 (less than or equal to)

forfiles /P I:\ /D -10/4/2010 /C "cmd /c echo @fname @fdate"

List files after 1/4/2011 (greater than or equal to)

forfiles /P I:\ /D +1/4/2011 /C "cmd /c echo @fname @fdate"

Delete files before 8/5/2011

cd "C:\Program Files\Microsoft\Exchange Server\Mailbox\First Storage Group"

forfiles /P . /D -8/5/2011 /C "cmd /c del E000*.*"