The Microsoft Exchange RPC Extractor (RPX) is a command-line tool that can parse network captures and interpret remote procedure calls made from a client to Microsoft Exchange Server. RPX uses the information provided in the Microsoft Exchange Server protocol documentation to parse RPCs, remote operations (ROPs), and the parameters for each ROP.
Download here: http://www.microsoft.com/en-us/download/details.aspx?id=3520
Until later,
Henrik Walther