NOTE this procedure isn't how to recover a lost administrator super-user account.
This is how to change a additional admin account when you still know the super user account password.
Changing the password for forgotten admin user account in the GUI is fairly straight forward. Click on the users, select change password, enter in old password, then enter in new one.
But what if don't remember or lost the password to the account. You need the old password to reset it in the GUI
To reset it without knowing the old password, you'll need to login to the CLI
SSH to the Firewall and logon as a user with admin rights
config system admin
edit admin
set password NEWPASSWORD
end
exit
