In Case you are not access Outlook OST file then you use third party OST Recovery Software. I suggest you can download OST to PST Converter Software which is best for recover and convert OST file to PST file. OST to PST Recovery Software automatically find out all types of OST File errors & fix all errors with safely recovery of OST File data and save to office365, Live exchange server, PST, EML, MSG, HTML, EMLX, MBOX, vCal and vCard format. In Conversion process of OST File along with inbox items, outbox items, journals, notes, inbox items, outbox items, calendars and appointments. OST to PST Conversion Software supports all MS Outlook versions included- 97, 2000, 2002, 2003, 2007, 2010, 2013 and 2016 and support 2003, 2007, 2010, 2013 and 2016 Exchange Server.
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