There’s an updated (November 2019) Dynamics 365 Licensing Guide. There are a number of changes which, as usual, you can find detailed in the Change Log on page 68. The most interesting ones include the addition of Digital Messaging – a new messaging Add-on for Customer Service Enterprise, licensed by user (page 19), and Chatbot Sessions for use with Azure Bot Framework bots, where each Chat and Digital Messaging licence receives an entitlement of 50 chatbot sessions pooled at the tenant level, with additional chatbot sessions available as an Add-on (page 31). There’s also some wording added on page 6 to clarify when logins are shared and individual with Device SLs.

Find this guide here: http://bit.ly/D365LGNov2019.