Download the most effective tool and that name is vMail OST to PST Converter Software to easily recover and convert OST files to PST, EML, MSG, MBOX, EMLX, vCal, vCard file formats. Conversion of multiple mailboxes from OST to PST is also possible. This converter assures that there will be no data loss during the process of the conversion. You can also see the preview of the converter so that you can convert the data with no errors. You can also try the free demo version of the converter and convert 30 emails for free.
Know more info- https://www.vsoftware.org/ost-to-pst-converter.html
How to Repair Offline OST file? So you can download and install Softaken OST to PST Converter which is the tool that can migrate all email attributes such as cc, bcc, time, subject, and from, etc. The best OST to PST recovery application offers the 100% safe and secure OST to PST outlook file. It is a multi-featured tool program that can migrate all OST mailbox attachments like- emails, journals, contacts, calendars, sent items, deleted items A free DEMO facility is offered for every user. Refer:- https://www.softakensoftware.com/ost-to-pst-converter.html