It is now possible to change the conversation state on an ongoing conversation.
Conversation States
Open When the conversation state is Open it is possible to send messages as usual:
Auto_Bot During this state an automated process or a bot is answering the messages, it is not possible to manually send messages.
However, a user which has the custom permission Social25.Allow Change Conversation State assigned can press the Take over conversation button to put the conversation to the Open state.
Blocked While the conversation is in Blocked state it is not possible to send and receive message within this conversation
Custom Permission
Not every user is allowed to perform changes on the conversation state. To give a user permission to do this you have to assign the Custom Permission (on the user Profile or Permission Set) Social25.Allow Change Conversation State. This makes the buttons to do this visible: