The best way to migrate IMAP email to Office 365 is to use the Cigati IMAP to Office 365 Migration Tool. It is an advanced and reliable solution that allows users to transfer emails from any IMAP-enabled email service directly to Microsoft 365 without data loss. The tool securely migrates emails, attachments, and folder hierarchy while maintaining mailbox integrity throughout the process. It supports bulk mailbox migration using CSV files, making it suitable for business and enterprise environments. Additionally, it offers features like selective email migration, date filters, admin impersonation, and compatibility with Gmail, Yahoo, Zimbra, cPanel, Hostinger, and other IMAP servers. Its user-friendly interface enables both technical and non-technical users to perform hassle-free migrations with high accuracy and minimal downtime.
If you want a safe and simple way to migrate IMAP email to Office 365 I recommend using the DataVare IMAP to IMAP Migration Tool. I used it recently to migrate multiple mailbox accounts without losing emails, attachments or folder structure. The software directly migrates data from one IMAP account to another including Office 365, without manual effort.
What I liked most was its easy interface and smooth migration process. It also supports bulk account migration which saves a lot of time for business users. Even non-technical users can handle the migration without issues. Before migration take a complete backup and verify IMAP settings on both accounts for a smooth experience.