To migrate from Yahoo Mail to Office 365 account, you can tryCubexSoft Yahoo Mail BackupTool that is helpful solution to directly migrate from Yahoo Mail to Office 365 account. It can simply save Yahoo Mail data to O365 with attachments. The utility supports to saveYahoo Mail to O365with metadata, formatting, images, etc. You can try it that can export 25 emails from Yahoo Mail to Office 365 account at free of cost.