Hi,
Thank you. Yes I read this and I know how to create / remove additional Admin account.
I will disable multiple log in for standard "Admin" account in Plesk ver. 11.5 .
I understand there will be no more this options in ver. 12 available?
This is Administrator's Guide for Plesk 12 version. All information there is actual for Plesk 12. I do not understand what option do you mean. Could you please clarify?