I advise you use-repair pst, may recovering lost Microsoft Outlook data is a sequence of operations involving scanning, identifying and saving such Microsoft Outlook items as messages, contacts, notes, reminders, journals, meetings, etc, recover data when a *.pst file completely or partially stops functioning, for example, it becomes completely or partially unreadable because of other applications, antivirus software or power failures, scans, identifies and saves data from the pst file without modifying or indexing the source pst file.