Free OST to Office 365 Converter
For the best results download eSoftTools Free OST to Office 365 Converter Software that rapidly export the desired OST files along with it's email properties and attachments. Securely export corrupted or damaged OST files without modifying the internal data information. This flawless utility migrates multiple OST files in to PST, MBOX, MSG, Office 365, EML, EMLX, MBOX, HTML, CSV, VCF and ICS file. Easy conversion procedure with comfortable and intuitive GUI.
Visit here for freeware software - https://www.esofttools.com/ost-to-office365-converter.html
kirti jaswal commented
if you want to convert any corrupted ost mailbox items in to pst file try stella ost to pst converter software to convert all ost mailbox items in to pst file this software is convert all ost mailbox items like emails, contacts, calendars, task, notes and many other items in to office 365 account this software is support all version 32bit and 64bit ost file this software is convert all ost file data using some simple steps. For more info visit this link https://www.stelladatarecovery.com/ost-to-pst-recovery.html
Albert Taylor commented
Bitdataconversion OST to PST Converter Tool is an effective & reliable tool that provides impeccable recovery. This tool recover & repair all damaged OST files and then convert them into a usable format that is PST, Office 365 and Live Exchange Server mailboxes. It restores all files in original formats such as EML, MSG, HTML, etc. It is a preview of all damaged or corrupted OST files before restoration. Free availability of demo edition with the help of you can easily understand the complete procedure of recovery.
For more info visit - https://www.bitdataconversion.com/ost-to-pst-converter.html