Many users face challenges when their OST file becomes orphaned and they don’t have access to Outlook to open it. The MailsDaddy OST to Office 365 Migration Tool eliminates this dependency by allowing direct migration of OST files into Microsoft 365 accounts without Outlook installation. This is especially beneficial for users who only have OST files left after system crashes or server disconnections. The tool supports all types of OST files, whether encrypted, large-sized, or corrupted. With a preview panel, users can check emails, calendars, and contacts before migrating, ensuring accuracy. It also supports both primary and archive mailboxes, giving users full control over how their data is organized in Office 365. The ability to handle orphaned OST files independently makes this tool stand out as a reliable and practical migration solution.