Resolution
Apart from the password reminder available on the login screen, you can use the plesksrvclient.exe utility located in %plesk_bin% folder to set up a new password or retrieve the old one.You could set the new passsword by running the following command:
"%plesk_bin%\plesksrvclient" -set <new_password> trueYou could also get the current password by running this utility with:
"%plesk_bin%\plesksrvclient" -getTo retrieve password in command line you can use -nogui option:
E.g.
"%plesk_bin%\plesksrvclient" -get -nogui > plesk_password.txtAfter that you can see retrieved Plesk password in plesk_password.txt file.