Using eSoftTools Outlook PST Recovery Software to import Outlook PST to Office 365 is a viable option. It can also convert files between ANSI and UNICODE. It shows a live preview of emails, diaries, contacts, notes, and calendars, among other things, while converting. You can convert up to 25 emails per folder in the free trial version.
For more information:- Import Outlook PST to Office 365
