If you are facing the fact that you can’t open your personal folder files (.pst), or you suspect that the .pst or .ost files are broken, you can use the scanpst.exe to make a diagnosis and fix the error in those files. The inbox repair tool only scan .pst and .ost files and never check other formats of files. Neither will it scan the mail addresses which run on Microsoft Exchange Server. This tool can make sure whether the structure of files is complete. If there are some errors in them, inbox repair tool will reset the file structure and rebuild the headers.
The inbox repair tool can fix the .pst file for Microsoft Outlook 97-2002 and user personal folder files for Microsoft Office Outlook 2003 and Microsoft Office Outlook 2007.
If you want to start fixing your .pst files, you can press “begin” at the main interface and the system will notice you if there is any error in .pst files. Users can start the repair procedural to fix the problem. During repairing, the system will create a backup file. The name and direction of it cannot be changed at that time. If users want to make a change, they need to choose the relevant menu and type the new name of it in the input box. Or they can simply press the “browser” button to search for files they want. After this procedural, the “repair” button will be available so users can click on it. When the repair is finished, users can use the new .pst file to start Outlook program. It's a very easy process that we actually used to help the guys over at the Alphacard blog when they couldn't access their email anylonger.
In the “go to” menu, you will find “folder list” menu. In it you will see a folder named “fixed personal folder” which contains the default Outlook folders or “lost and found” folder. Because the fixed .pst files are usually rebuilt, they are empty for most of time. In “lost and found” folder there are folders which are fixed by inbox repair tool. The missing items in this folder cannot be repaired.