OST to PST Converter from KDETools Software. It is the unique solution to recovers your offline stored emails, contacts, calendars, tasks, notes, etc. and also convert emails, mails data from Outlook OST file in new Outlook PST files. We all know that it is hard to OST to PST conversion manually. It has a simple and intuitive GUI interface for the users to convert the data without any technical assistance. By using this tool you can export OST emails to Office 365 account with Zimbra, Gmail, EML, EMLX, vCard, ICS, MSG, PST, Live Exchange server, MBOX and etc.
more info- https://www.kdetools.com/ost/