If Outlook does not seem to be working correctly the Inbox Repair tool (Scanpst.exe) can diagnose and repair errors in the outlook file, including archived emails (*.PST file type). The tool determines whether the file structure is intact. If it is not intact, the Inbox Repair tool resets your file structure and rebuilds the headers.
To learn how to repair Outlook, follow the instructions on Microsoft Repair Outlook Data Files.
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