As shared by the Windows team blog, the anniversary update for Windows 10 is now officially released as on Tue 2 Aug 2016.
This update is free for all licensed users and will be automatically rolled out to users worldwide through Windows Update*. This Anniversary Update is identified as “Feature Update to Windows 10 Version 1607”.
If you cannot wait for this automatic WU to kick in, you can go right to Microsoft’s Windows 10 Update History support page and manually download the executable (direct link to Windows10Upgrade28084.exe ~5.5MB).
To learn more about the “Windows 10 Anniversary Update”, see “New Video Series This Week On Windows Highlights Windows 10 Anniversary Update“.
* provided that you did not disable the WU service as part of your organization’s policy to retain absolute control over how and when updates, hotfixes, patches, etc. get deployed