MailsDaddy OST to Office 365 Migration Tool is an easy-to-use software designed to migrate OST files directly into Office 365 accounts with complete safety and accuracy. The tool helps users transfer emails, contacts, calendars, notes, tasks, and attachments without affecting the original data structure or folder hierarchy. It supports bulk OST migration, selective mailbox transfer with advanced filters, and even works smoothly with inaccessible or damaged OST files. Its simple interface and powerful migration features make the Office 365 migration process smooth, secure, and hassle-free for both personal and business users.