You can easily migrate your Yahoo emails to Office 365 using the SysInfo Yahoo Email Backup Tool. This utility allows you to transfer your entire Yahoo mailbox directly to your Office 365 account without any data loss. Just sign in to your Yahoo account through the software, select Office 365 as the target, and pick the specific folders you wish to move. The tool maintains the original folder structure and gives you options like date-based filtering, skipping duplicate messages, and excluding attachments if preferred.
Read more: https://www.sysinfotools.com/yahoo-backup.php