eSoftTools OST to PST Converter software is best to export OST file to PST without the need of Outlook. It recovers data from inaccessible OST file and it also exports/saves OST data to PST, MBOX, Yahoo, Gmail, Office 365, Zimbra TGZ, HTML, vCard and many other options. This program supports all Windows version O/S. You can also try this tool with demo edition which can allow you to convert OST for free.

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