There’s an updated (January 2020) Power Apps Licensing Guide. There’s some useful information added on page 3 detailing the licensing requirements for external users, and confirmation included on page 4 that if the same Power Apps app exists in two environments, a user would require two Per App SLs to access both. As usual there’s a detailed Change Log on page 25, and you can find the updated guide here: http://bit.ly/PowAppsLGJan2020.
There’s an updated (December 2019) Dynamics 365 Mixed Reality Licensing Guide. There aren’t major changes, just the renaming of PowerApps and Flow to Power Apps and Power Automate, and you can find this guide here: http://bit.ly/MixRealDecLG2019.
There’s an updated (December 2019) Dynamics 365 Licensing Guide. It includes confirmation that users licensed with Sales Professional may use Marketing Campaigns and Lists, and that while users with Team Members licences have access to the Dynamics 365 Mobile app, they don’t have access to offline capabilities. And finally, the Power Platform family completes its round of name changes with PowerApps going to Power Apps, and Flow to Power Automate.
Find the updated guide here: http://bit.ly/D365LGDec2019.