In a Persistent Chat Room New user / views Question

[Anthony Pinto]

In a Persistent Chat Room - Will there be an option to enable historical view, allowing a newly added user to see past posts? 

[#2]

Within Microsoft Teams, users can review all conversations that haven occurred.

[#3]

So if I start a room at 8AM and add an additional user or two at 10AM, they will be able to go back and see the past conversation from 8AM on?