Do you need to Open or import items from an offline Outlook Data File (.ost). In this situation, you can try the eSoftTools OST to PST Converter tool. This tool is the best third-party solution. It recovers corrupted OST files with all email properties like to, cc, bcc, subject, time, date. And convert into a new format as users want to save- PST, EML, EMLX, MSG, MBOX, HTML,Office 365,vCard,Gmail,Yahoo,etc.It can work in offline mode without losing your data record.