New Reverse Authentication Feature questions

We see a new checkbox "Allow persistent sessions" and a section "Logout" to define specific logout URL's. We would like to know if persistent sessions are meant to solve the password prompt issue with Exchange 2013 switching between /owa and /ecp virtual directories and what syntax to specify in the LOGOUT URLS to allow a complete logout of Exchange 2013/2016 users.

Thank You

Joseph Worrall