Using OST to PST Converter
from KDETools application you can not only recover your data but also export into new workable file format as per your need. With the help of this OST to PST Converter software, you can directly transfer your data into cloud-based application Office365 & Live Exchange Server. Quickly get OST converter tool smoothly export OST to PST or other files like Zimbra, Gmail, EML, EMLX, vCard, ICS, MSG, PST, Live Exchange server, Office 365 , MBOX and etc. The OST to PST software serves a free demo version which allows you to access 30 emails in each and every folder free of cost.
More info- How to convert OST to PST Outlook