In the OST corruption scenario, the only one application that can help you is
ATS Exchange OST to PST Converter. This application has a surplus feature that is the very important part of it. The best facility of this tool is it maintains the original formatting of the data after the conversion.
It previewing the recovered data before conversion. This tool helps you to recover data again and convert into new Outlook PST file format without facing any difficulty. This tool deeply scans OST file and fix all the errors then convert the whole data into PST and other interesting file formats such as EML, EMLX, MBOX, vCal, vCard, HTML, MSG. After recovering the data from OST file it saves your mailbox component in PST Outlook.
The feature is cloud-based application Office365 & Live Exchange Server. If you want to export your OST file so that is possible through the aid of this program. You can install it on every Window version such as 95, NT, 98, ME, XP, Vista, 7, 8, and 8.1,10 (32bit & 64bit).
It provides 24x7 technical support for you to help in every critical situation. To judge its histrionics download free demonstration from its official site and convert 30 emails per folder free of cost.
Free Download Software with Softonic: https://ats-ost-to-pst-converter-toolkit.en.softonic.com/
Free Download Software with Cnet: http://download.cnet.com/OST-to-PST-Converter/3000-2369_4-77530261.html