Logout (between several application)

Hi all,

I would like implement logout workflow between several applications. It means when I click on logout link in my app and go to another app, the another app makes logout too. Currently It works for another app from my system, however when I am authenticated in a few app and click on logout link in the another app after that my app doesn't logout user from system.

As I understood I have to configure Assertion comsumer.
Could you please explain how to do this?