MISTRAL VERSION 7
Log in to your personal Mailinblack area and go to Access my admin area at the top right of your screen by clicking on your Surname and First name. Click the Users menu to the left of your area.
Hover your mouse over the line of the user in question and click on the following icon to modify their profile:
In User profile and status, you can choose between user and manager.
You can also define a manager by going to the Company Profile menu and clicking Add manager.