Question about Outlook Express

How can I report someone with a hotmail account who has attempted to defraud?  It was the usual gambit of offering to send a cashier's check by "my shipper" to pick up an expensive item I listed on Craiglist.  It would be most helpful if Microsoft offered that feature as a subdirectory of the help option.  I didn't respond after I realized what it was but I'd like to report it so no one is harmed by this low-life.  I'm sure Microsoft must have a way to identify this person.  If you won't investigate it, WHY NOT???