Microsoft Outlook provides an inbuilt utility called scanpst.exe which is also known as an Inbox repair tool. It is competent to repair corrupt/damaged PST files at some extent. Scanpst.exe as the name suggests- "scan a specified PST file, examine a PST file directory form & check mail item reference to headers and repair it.
In Outlook, all emails and folder items are stored in a single PST file. If your PST file becomes corrupt and user is not able to open their folders and mailbox items, at that time you must run Scanpst.exe utility. This inbox repair tool diagnoses the issues of PST file & initiate performing repair over the corrupt PST file for restoring it back to as close to its corruption free state as possible.
Inbox repair Tool is a part of Outlook email application which gets installed with the installation of Microsoft Office suite. On running this repair program for the first time, it checks the corrupt/damaged PST file by performing scanning for it. After complete scanning of Outlook Data File, if software encounters glitches it will prompt complete information on the screen and asks the user to move further for repairing PST file. It also gives an option to create backup of PST before executing the damaged data. Creating backup of the corrupted PST file often helps a user because scanpst.exe does not ensure about the accuracy of repairing. So, if you are going to repair PST file, then make it's a backup file by simply copying it or exporting it.
This utility store in your machine at this location-:C:/Program Files/Microsoft Office/OFFICE12 or C:/Program Files/Common Files/System/MSMAPI/1033
Wait till the completion of the scanning process that basically depends on how huge PST file size is.
After finishing scanning process, it shows a short preview of scanning report & allows some options to move on the next step. To get more info about type of corruption and profound information about it, click on "Details" button.
There was a discussion about backup of data file in the above paragraph in which I had suggested to create a backup of PST file manually. In order to do a backup of PST file, this utility endows an option of "Make Backup of scanned file before repairing". Just check this box, allocate location to save this file using Browse button and it starts backing up the scanned database.
In the next step: Click on "Repair" button.
Open Outlook profile which PST file you want to repair. Click on "GO" menu and >> Folder list tab Folder list option shows particular folder name recovered personal folders that contain pre default. In which recovered folder are empty, because it is a rebuilt PST file form. Found and lost folder contains all items recovered by scanpst.exe utility. The items missing from found and lost folder cannot be repaired.
If scanpst.exe fails to correct the Outlook errors, you can choose third-party solution like Outlook PST file repair tool to repair PST file. With the help of this software, a user can easily get back lost data files from Outlook including all email attachment. This tool has the capability to fix PST file errors & oversized data file size issues.