You can try the eSoftTools OST to PST Converter Tool helps us to convert email from OST to PST, EML, EMLX, vCard, and another format. This tool is 100% tested with Anti-virus and online scanners. OST to PST Converter tool supports all versions of MS Outlook 2000, 2002, 2007, 2010, 2013, 2016, and the below version. User can Convert Single and Multiple emails and mailbox as per requirements.
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if you search any ost to pst converter software and not find any ost to pst converter software try stella ost to pst converter software to convert all ost mailbox items in to pst file this software is convert all 32bit and 64bit ost file this software is convert all ost mailbox items using some simple steps. This software is convert all corrupted and unmounted ost mailbox items in to pst file. for more info visit this link https://www.stelladatarecovery.com/ost-to-pst-converter.html