Microsoft will be publishing updated media for Windows 10 1511 -- the version also known as Windows 10 1511 and Build 10586 -- "in the coming weeks" through Windows Update, Windows Update for Business, Windows Server Update Services, its Volume Licensing Service Center and MSDN.
Here's what IT folks overseeing the deployment of Windows 10 need to know:
For devices being serviced using Windows Update for Business and configured to "Defer upgrades," Windows 10 1511 will begin to deploy as soon as the updated media has been published.
For devices being serviced using Windows Server Updates Services, the updates to the existing Windows 10 1511 feature updates will need to be re-approved once the new updated media is received (unless you have an automatic update rule configured for the "Upgrades" category).
For devices that will be upgraded using System Center Configuration Manager or Microsoft Deployment Toolkit task sequences, you may want to switch to the latest media (downloaded from the Volume Licensing Service Center) instead of the current Windows 10 1511 media. Alternatively, you can inject the March cumulative update (KB3140768) into your existing media.
I believe these more granular Windows 10 update settings may have something to do with today's Current Branch for Business release, but I haven't been able to get comment from Microsoft regarding specifically how they are related. If and when I hear more, I will update this post.