To export an Outlook OST file to PST format, you can use eSoftTools OST to PST Converter software. This tool helps users easily convert inaccessible or orphaned OST files into PST format without losing any data. It maintains the original folder structure and supports emails, contacts, calendars, and attachments. After the conversion, the PST file can be directly imported into Microsoft Outlook, allowing you to access all mailbox data smoothly and safely.

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