The safest method to migrate IMAP emails to Microsoft 365 without losing data is to use a reliable IMAP migration tool that preserves the original folder structure, email metadata, attachments, and timestamps during the transfer. SysInfo IMAP Backup Tool provides a practical way to migrate IMAP mailboxes directly to Microsoft 365 with secure authentication and folder mapping. It supports both single-account and batch migration through CSV, making it suitable for organizations moving multiple mailboxes. Users can also apply date-range and advanced email filters, remove duplicate messages, and use incremental migration to transfer only newly added emails during subsequent runs. The software provides migration logs and progress tracking to help monitor the process and identify skipped or failed items. Since migration requirements vary by provider, it is recommended to test the process with the free trial before performing a complete mailbox migration. This approach can help reduce manual work and maintain organized mailbox data throughout the IMAP-to-Microsoft 365 migration.
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