To import IMAP to Office 365 directly, go with CubexSoft IMAP Backup tool that has efficient migration process to directly move IMAP supported apps & cloud apps data to Office 365 directly. The software has batch approach to convert all data to O365 without missing any detail. The software directly connect IMAP account and save your data in Microsoft 365 cloud account directly. it retains all data integrity without any error. Using its free demo edition, you can check out its working efficiency with free 25 emails migration from IMAP to O365. https://www.cubexsoft.com/imap-backup/