A PST file is a personal folder file used in Microsoft Outlook that is used to hold data whilst Exchange Server is not being used. PST files are generally password protected, but it is possible for a user to forget this password, which might block him or her from all of their Microsoft Outlook data. In general, network administrators are able to provide users with their password when such cases occur, but it is not unheard of for a network administrator to be unable to recover the password themselves.
This software has been specifically designed to provide users with a utility that can locate their PST file password for them, essentially decrypting their file by accessing the user's personal folder. The passwords are protected by Outlook using complex encryption algorithms. This software decrypts the password and shows it to you, which you can then continue to use in order to access your PST file.