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To migrate OST files to Office 365 smoothly, always back up your data first. Use a reliable tool like Softaken OST to Office 365 Migration tool for direct import. Ensure you have admin rights and a stable internet connection. Apply filters to migrate only necessary data and avoid server overload.
How to Repair OST Files Without Losing Emails: If your OST file is corrupted, use Microsoft’s ScanPST tool for minor issues. For deeper repairs, use professional software like Softaken OST to Office 365 Migration tool. These tools recover emails, attachments, and contacts without data loss. Always back up your OST before repair and import the recovered file back into Outlook using the Import/Export feature.