Here is Jason Johnston's post on the Exchange API-spotting blog:

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The Exchange Interoperability Team is excited to announce the initial release of the Microsoft Exchange RPC Extractor (RPX). RPX is a command-line tool that can parse network captures and interpret remote procedure calls (RPCs) 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.

The goal for RPX is to assist developers who are implementing the Microsoft Exchange protocols by allowing them to view and compare the RPC traffic between clients and servers. Network capture files are transformed into text files that detail RPC requests and responses, including parameters and return codes.

If you are working with the Microsoft Exchange protocols, follow the link below to download RPX today and try it out!

Microsoft Exchange RPC Extractor 1.0

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If you are working with Exchange protocols this is a very helpful tool to facilitate the development and debug process. If you are working with SharePoint or Office Communications Server protocols please make sure you check out Network Monitor and the available Office and SharePoint parsers and Office Communications Server parsers.