Open SCANPST.EXE.
Select Browse to select the Outlook Data File (.pst) you want to scan. If you need help locating your Outlook Data File, see Locating the Outlook Data Files.
Note: By default, a new log file is created during the scan. You can choose Options and opt not to have a log created, or you can have the results appended to an existing log file.
Choose Start to begin the scan.
If the scan finds errors, choose Repair to start the process to fix them.
Shows results of scanned Outlook .pst data file using the Microsoft Inbox Repair tool, SCANPST.EXE
Note: The scan creates a backup file during the repair process. To change the default name or location of this backup file, in the Enter name of backup file box, enter a new name, or choose Browse to select the file you want to use. You may need to run the tool several times in order to repair your Outlook Data File. In some cases, items may not be recovered if they were permanently deleted or corrupted beyond repair.
When the repair is complete, start Outlook with the profile associated with the Outlook Data File you just repaired.