Are you looking for helpful software to transfer OST to Office 365 then take help of eSoftTools OST to PST Converter software, this software has power to convert large OST to small PST file, also it has ability to export OST emails to PST, MBOX, MSG, HTML, vCard, office365, yahoo, gmail, and more, it supports all windows versions from old to new, so use it now without delay.

Read more- Migrate OST to Office 365