You may also check the link below and see if it helps. However, you may search the web for any third party software for the conversion.
MICROSOFT CONVERT OST TO PST WINDOWS 10
Easy to works on all Windows version including Windows 10 and all lower versions. There is no Microsoft application to convert an ost file to a pst file.
ATS OST to PST Converter Software is effectively working all MS Outlook versions: office 365, Outlook 2016, Outlook 2013 and other below versions. OST Converter tool to split large PST files small pst file in a conversion process to user define file size. Step 4: As the brand new window opens, click on on the Import/Export. Step 3: Then, choose the Open and Export possibility there. Step 2: Click on on the ‘File Menu’ from the highest left nook of the Outlook app. OST to PST Software to easily export single or multiple OST files in Outlook PST file with Another file format like MSG, EML, EMLX, MBOX, vCard, and vCal file formats. Convert OST information to PST manually by following the steps beneath, Step 1: Firstly, open the MS Outlook in your PC. It is very graceful OST to PST Conversion process to import Outlook E-mail in PST e-mail format with restoring all OST e-mail properties.
This OST Converter Software through which you can restores all OST folders items such as Calendar, E-mails, Attachment, Contact, Notes, Task, and Draft. This software to easily export OST file to Office 365 & live exchange Server with Outlook PST. ATS OST to PST Converter Software is very helpful OST Recovery solution that repairs all types of bugs and then you can without problems preview recovered Outlook OST E-mails data and assist you to convert OST file to PST, EML, MSG, MBOX, EMLX, vCal, vCard and HTML file formats.