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You can try the MCT OST to Office 365 Converter Tool, which allows you to directly import OST files to your Office 365 account along with all details and attachments. This software enables users to transfer all folders and mailboxes from the OST file to Office 365 with zero risk of data loss during the conversion process. Furthermore, the Quick OST to Office 365 Conversion feature allows you to easily convert all emails, attachments, and folders from an OST file to Office 365 without any data loss.