I'm looking for a relatively inexpensive tool that supports full Boolean
searches of .PST files and/or the Microsoft Exchange Server information
store. I only need to search one Exchange mailbox at a time. Ideally, the
tool would allow me to define a date range, some parameters like "to" and
"from," and then a complex sequence of parameters with Boolean operators,
such as "(a OR b) AND (c OR d OR e)." Does such a tool exist?

Thanks,
John