Room Creator can create and manage Chat Rooms in the online control panel: Skype for Business Group Chat is not available to Exchange 2007/2010 customers at this time. Skype for Business Enterprise license needs to be enabled for the users who would need to utilize this functionality.
Messages are posted in real time and are saved over time, so they are visible to current and future chat room participants. Skype for Business Group Chat is a Skype for Business feature that provides chat rooms where you can have an online extended conversation with other people about a certain topic.