There’s an updated (June 2016) Volume Licensing Brief for Windows Intune. There aren’t major changes to the document – just an update to the EA minimums moving from 250 to 500 users/devices, but if you want an overview of Intune licensing it’s worth a read through.

Find it, as usual, with all of the other Microsoft Licensing Guides here: http://bit.ly/MSLicensingGuides.