You can recover & remove passwords from PST files; I advise utilizing the GainTools PST Password Recovery Software. Even those who are not techies can remove the password from PST files using Outlook's graphical user interface (GUI). The Remove Password from Outlook PST File software supports both ANSI and UNICODE PST file types. Passwords can be extracted from any PST file using this utility without having to download Microsoft Outlook.
Read More:- gaintools.com/pst/password/