Users often look for a safe way to import OST to Office 365 without risking mailbox data or folder structure. The Office 365 Backup Software helps move OST mailboxes into Office 365 accounts while maintaining emails, contacts, calendars, and attachments. It supports large OST files and ensures accurate mapping of mailbox data during the transfer. This approach is useful when dealing with offline OST files or account changes and simplifies the overall migration process for users needing to import OST to Office 365.