The latest Windows 10 ADK update, build 10586, was silently released a few days ago (Thanks deploymentresearch for the download link). In this post you learn about what’s changed.
Download link: http://download.microsoft.com/download/3/8/B/38BBCA6A-ADC9-4245-BCD8-DAA136F63C8B/adk/adksetup.exe
Warning: Do NOT upgrade your ConfigMgr 2012 R2 SP1 or MDT 2013 Update 1 environments to this build yet. For ConfigMgr, even though it seems to fix the x64 UEFI / PXE and Powershell/.NET issue, which is great, the new ADK does break Computer Refresh scenarios (Bare metal works). The error code is 0x80220014. Research and discussions with the product teams in progress… MDT 2013 Update 1 yet to be validated, but error comments on twitter does not give me a warm and fuzzy feeling.