If you want to export your Outlook OST file to PST format, eSoftTools OST to PST Converter Software is an effective and user-friendly solution. Outlook itself doesn't allow exporting orphaned OST files, but with this tool, you can easily and safely convert complete mailbox data such as emails, contacts, calendars, tasks, and attachments to a PST file. The software maintains the original folder hierarchy and also provides a preview option for selective export.

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