Microsoft has no publicly available documentation for the structure of .ost or .pst files.

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Sue Mosher, Outlook MVP
Author of Configuring Microsoft Outlook 2003
http://www.turtleflock.com/olconfig/index.htm
and Microsoft Outlook Programming - Jumpstart for
Administrators, Power Users, and Developers
http://www.outlookcode.com/jumpstart.aspx
Hi Mosher,
I'm thankful for ur prompt response...For reading PST file, I have seen
Libpst...Just for testing, I tried OST file with this, but no use...
Coming OST file to PST file conversion, I have seen ost2pst tool, but I'm
unable to find source code for conversion of OST file to PST file...
Regards,
nag.
> Microsoft has no publicly available documentation for the structure of ..ost or .pst files.
>
[quoted text clipped - 10 lines]
> > Regards,
> > nag.
Sue Mosher [MVP-Outlook] - 05 Oct 2006 17:50 GMT
There is no published source code for that, to my knowledge. As I said, these are undocumented file formats.

Signature
Sue Mosher, Outlook MVP
Author of Configuring Microsoft Outlook 2003
http://www.turtleflock.com/olconfig/index.htm
and Microsoft Outlook Programming - Jumpstart for
Administrators, Power Users, and Developers
http://www.outlookcode.com/jumpstart.aspx
> Hi Mosher,
>
[quoted text clipped - 21 lines]
>> > Regards,
>> > nag.