I recently forgot the password of my old Outlook PST file and was quite worried as it contained important emails and contacts. I tried many free tools, but none of them worked. Then I found
DataVare Outlook PST Password Recovery Expert.
Some highlights of this tool:100% effective in removing passwords
Works with any Outlook version (from 2003 to 2019)
Absolutely safe and user-friendly interface
No data loss
I used it myself and recovered my password in just a few clicks. If you are also facing the same problem, then definitely try this tool once.