Here is another excellent & user-friendly
Outlook OST Repair tool also available for restoring all your Outlook data including emails, appointments, journals, tasks, images, email properties, drafts, etc. It helps us to export corrupted OST file data into new or existing Outlook PST files, PDF, vCard, MSG, vCal, MBOX, EMLx, HTML, EML, NSF file types and also with cloud application like as Live Exchange Server, Office365, etc. This utility recovers all the permanently/deleted mailbox items of PST file and also recovers password-protected OST files without any trouble. This toolkit is workable with all the editions of OS Windows (32bit & 64bit) and 2010, 2016, 2007, 2013, 2019 & older versions of Microsoft-Outlook. Install or download the freeware Trail Pack of this software, which allows you to convert the first 30 emails per folder is free of cost.
Read more:https://www.vartikasoftware.com/product/vs-ost-recovery.html