With the help of OST to PST software you can easily fix OST errors and after that you can easily convert OST emails to MS outlook without loss any data. This OST to Office 365 tool save OST file to PST with other format as:- EML, MSG,HTML,MBOX as well as it also gives option to divide large PST file into small PST file. For more info visit this link https://www.duxdatarecovery.com/outlook-ost-to-pst.php