Install and Run OST Recovery Software and Select the Add File tab and Choose the "Advance Scan" Option
Now Watch the Scanning Process of OST File
Software Presents Normal Views of OST Mails
Export Selected OST Mails Just by Selecting and Right Clicking on Particular Mail. Click on Export button of Menu bar to Migrate the All Items from the OST File.
Export OST Data into PST, Office 365, HTML, EML and MSG Formats