If you did forget your Plesk Admin Access there are some way to recovery or to reset it. Here I will post some of them.
Linux:
For this you need SSH access as root or sudo.
Password Recovery/Reset (Plesk 10 to 11.5):
Code:
/usr/local/psa/bin/admin --show-password
Code:
/usr/local/psa/bin/init_conf -u -passwd *new password*
You can use the Plesk Login command to access the web interface and from there you can set a new Admin password.
Code:
plesk login
Code:
plesk bin admin --set-admin-password -passwd *new password*
Connect over RDP on a user with Admin rights, then Execute (win+r):
Code:
%plesk_bin%\plesksrvclient.exe
Plesk Onyx:
Code:
plesk bin admin --set-password -passwd <new_password>
Code:
"%plesk_bin%\\plesksrvclient" -set <new_password>
You can read more about it on the Plesk Documentation:
https://support.plesk.com/hc/en-us/articles/213381869
https://support.plesk.com/hc/en-us/articles/213410689