Download, Install & Run DRS PST Password Remover software. Click buynow to purchase the full version or Activate button to enter the purchased key. Here we choose the Try demo option to explain the working.
The demo version alters only the first 50 emails for free.
Click on the Select Files button to select the PST from the system (file to add a new password)
Now the PST file has been added to the software(The file is not password protected as shown in the below image)
After that click the Set password button to add a new password to the selected file.
Type a new password and confirm it. Click OK.
Now your PST file is password protected. Shown in the below figure.
Launch DRS PST password remover utility. Click the select files button to add a password-protected PST file from your system.
Now click the remove password button to unlock the password-protected PST file.
Now your PST file is password-free as displayed below.