Use Stella's ost to pst converter software to convert your ost data into a pst file. Stella ost to PST converter software convert all the elements of the ost file. Stella ost to PST converter software can convert all information in the ost file, including emails as well as calendars, contacts, calendar items, task items notes items, journal items as well as all items in the user-defined folders. Stella ost-to-pst converter software is compatible with all versions of exchange ost file. Stella ost to pst converter software convert all items in the office 365 account. Stella is a converter for ost software that converts all the items in the EML and EMLX. Stella ost-to-pst converter software can convert all corrupted ost files in to the format pst. This link provides additional information. https://www.stelladatarecovery.com/email-migration/ost-to-office-365.php

Go with the smart alternative OST to PST Conversion Tool. This is comprehensive software to convert your OST files into multiple other file-formats including Inbox, Drafts, Outbox, Sent Items, etc. It also smoothly recover unreadable OST files and export OST into PST file format with all OST file emails Meta data like cc, bcc, to, from, date, time and subject, etc. It also supports all MS Outlook 2003, 2007, 2010, 2013, 2016. Etc. This software support all MAC OS & Windows OS. Download the free demo version of the software.