A tool included with Microsoft Exchange Server that you can use to check and repair problems with personal folders and offline storage files in a messaging system that uses Microsoft Windows messaging clients (such as Microsoft Outlook). The Inbox Repair Tool is installed on clients that have Outlook installed. It is also included on the Windows 98 CD as the utility scanpst.exe.
When you run the Inbox Repair Tool, it analyzes the .pst file’s directory structure and item headers and tries to recover all the folders and all the items in those folders. If it finds any errors, it attempts to recover the damaged items. It also creates a log file of the actions it has performed, which you can examine later for further information. The tool creates a new set of empty Outlook folders along with a Lost And Found folder that contains any folders and items it recovered from the .pst file. You can then create a new .pst file and drag the recovered folders and items to your new Personal Folders entry in your Outlook profile.