PST Data Structure View Tool (PSTViewTool) is a tool supporting the PST file format documentation effort. It allows the user to browse the internal structures of a PST file.

Developers can now develop tools to directly interact with Outlook data files.  If you’re looking for more information on working with Outlook data files check out the interoperability press release.

Link: http://pstviewtool.codeplex.com/

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