The Microsoft Inbox Repair Tool (scanpst. exe) is a utility that can be used to detect and repair problems with Outlook data files (. pst) for free. The tool scans the PST file, shows you the errors and can correct them, and in some special cases, it can retrieve some information from a backup file .
If you want more enhanced repair features then you should go with the professional tool like the Shoviv Outlook PST Repair Tool. It can also repair large PST files, to restore the deleted items permanently, and to store the repaired data in the most common file formats inclusive of PST, MSG, EML, HTML and so on. Data recovery in the tool is enhanced by the efficient computations expressed in maximum accuracy algorithms.