If you want to migrate Outlook OST to PST, the most reliable solution is to use eSoftTools OST to PST Converter. This software easily scans even orphaned or corrupt OST files and converts them to PST format without data loss. It has a preview feature that lets you check emails, contacts, calendars and attachments. This tool supports all Outlook versions and maintains the original folder structure. Simple steps: select the OST file, scan it and export it to PST.

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