The “Licensing Windows and Office for Use on a Mac” Volume Licensing Brief is updated for December 2015 to include Windows SA per User and VDA per User licensing.
There’s a new question added which sums up the changes: “Can a user licensed with Windows Software Assurance per User or Windows VDA per User access Windows Enterprise on or from a Mac?”
The answer – yes, through a VDI environment, or installed locally if the Mac is licensed with Windows 7/8/8.1 Pro. Get the document here: http://bit.ly/Hkv3BM.