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To convert OST to PST, one can use a manual method (ScanOST.exe or Outlook Import-Export Wizard). But, it only works if the OST file is healthy and connected with Exchange Server, and it asks for technical expertise. Hence, the user has to use third-party software like Shoviv OST to PST Converter. It helps to convert OST to PST, even inaccessible and corrupted OST files.