It’s always good to come across a new Licensing Guide and this Windows Server 2012 R2 one is pretty comprehensive. It’s dated April 2015 and has all the information contained in previously released datasheets as well as a long FAQ section where you’ll find all the usual suspects as well as a couple of useful Azure-related questions (Q21 onwards) clarifying a couple of Licence Mobility issues.

Definitely worth downloading for your Useful Licensing Guides folder: http://bit.ly/1e3uNa4.