When legacy systems are decommissioned, OST files often remain as the only source of historical email data. Accessing and restoring this information becomes difficult without the original Exchange setup. The MailsDaddy OST to Office 365 Migration Tool addresses this scenario by enabling direct migration of OST files into Microsoft 365 accounts. It scans OST files thoroughly and presents a structured preview of all folders and items. This allows administrators to ensure data accuracy before migration. The tool supports encrypted and large OST files, making it suitable for long-term archived mailboxes. It also provides selective migration options to upload only relevant data. Since no Outlook installation is required, the software fits perfectly into system retirement projects. Moving data into Office 365 ensures that important communication remains accessible even after legacy infrastructure is shut down.

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