I think users should go for MailsDaddy Free PST Viewer to open password-locked Outlook PST files without paying any charges. Here users can view all Outlook PST file databases without any hassle, like email, contact, calendar, notes, tasks, attachments, etc. It can read archive, ansi, and unicode PST files with maintaining original folder hierarchy and text formatting. The software support all editions of MS Outlook and Windows OS.
For data conversion from inaccessible PST files, users can go for the pro version pack. it enables users to export PST files into EML, MSG, MBOX, PST, and others.