Office 365 migration is bit a risky task. It needs proper planning for systematic execution. It should ensure data integrity during migration. Even though there are several manual approaches to follow, all those put limitations for the task. So better to go with third party tools like EdbMails Office 365 Migration software which handles the process seamlessly.
Office 365 Migration tool
No need of much technical experience to handle the operation as it is having very simple and user friendly GUI. It also ensures zero downtime as the server will provide continuous services during migration.