Update: Microsoft has now confirmed they have removed the files in a statement sent to Windows Central from a spokesperson:

"The November update was originally available via the MCT tool, but we've decided that future installs should be through Windows Update. People can still download Windows 10 using the MCT tool if they wish. The November update will be delivered via Windows Update."

Original story: If you were hoping to upgrade your PC with ISO files with the current 10586 November version of Windows 10 with Microsoft's Media Creation Tool, that option has now been removed. The company has quietly updated the Windows 10 Media Creation tool so that it no longer offers downloads of the November update, also known as version 1511, for the OS.

Instead, the Windows 10 Media Creation Tool lets users download the old build 10240 of the OS that was first released in July, Furthermore, it appears that Microsoft is no longer offering the November update to current Windows 10 users via the Windows Update feature. We have contacted Microsoft to find out why they have made this change.

Thanks to "TheSuperShoe" for the tip!

Source: Microsoft