check that she hasn't got a personal file that is storing all these messages, do a search for *.pst on her PC and see what comes up, you will get one maybe two .pst files, so check the size of them and if they are quite large then there is your answer...just import the .pst file to Outlook (even on to your PC across the network) and you can see all the emails.
If this isint the case, and you have searched everywhere, go to the Server, and go to x:\Exchsrvr\imcdata\out\Archive\ (where 'x' is the dirve that Exchange is on, usually E:\ or F:\ or something) and in here are a list of all emails that were sent out...they are in a no format, ie, the file name might be "Fy5869" with no extension, so open them in notepad and you can read the text element of the mail, including who it was sent to,what time, and what it said.
good hunting!!!!
Jay~
"I have to think of a funny footer to
put in here!!!???"
~KeyTech