In Parallels Plesk Panel 9.x for Windows password reminder is available into login screen but we can use the plesksrvclient.exe available in the %plesk_bin% folder to get a new password or to recover the old one.
To set up a new password we need to run a following command:
"%plesk_bin%\plesksrvclient" -set <new_password> true
To retrieve the current password:
"%plesk_bin%\plesksrvclient" -get
To retrieve the password in command line we need to use the option -nogui
"%plesk_bin%\plesksrvclient" -get -nogui > plesk_password.txt
After that, we can find the new Plesk password in the plesk_password.txt file.