From Thegrideon Software:
Outlook Password by Thegrideon Software is a very easy to use password recovery tool for MS Outlook .
It instantly recovers passwords for MS Outlook '.pst' files (also known as: Personal Storage, Personal Folders or Data Files). Password protection can be removed / cleared from '.pst' file if necessary.
It also recovers e-mail accounts details (logins, passwords, server settings) stored in MS Outlook records.
Large .pst files (4Gb+) are supported.
All MS Outlook versions and encryption methods are supported.
Outlook Password lists current MS Outlook Profiles and associated '.pst' files.
'*.pst' file search and mass processing feature is available as well.
Lists of files and passwords recovered can be exported as '.csv'.
No additional external libraries or frameworks to install.
Works on Windows XP - Windows 10.
I had a 200mb Outlook 97 PST file that somehow got a password on it. Don't know how, but I needed the e-mails back! For $19, this program worked perfectly AND was the cheepest password recovery software out there. Very good!