Is one of your agent still logged in ? You can disconnect him manually by clicking on his status in the list of users in the People > Management section of the administration :
Once disconnected, your advisor's console will automatically display this message :
NB : This feature does not work if the operator is connected to mobile applications.
If manual action does not work, you can as a last resort, open an iAdvize support request via the Help Center. To access it, follow the steps in this article.