MailsDaddy Exchange Server Suite
MailsDaddy Exchange Server Suite is the best solution to export Exchange, Office 365, Outlook items to various file format including Office 365 account. The application has lots of advanced features like preview, batch migation, selected convesion etc. You can also recover corrupted mailbox into desire mail format with all elements. The free demo edition of the software exports up to 20 items from each folder.
Get more info: https://www.mailsdaddy.com/exchange-server-suite/