WSUS Server 2012 R2 Windows 10 Feature Updates not found

So you are on Server 2012 R2 and have a WSUS server to serve your updates to your Windows 10 clients. Perfect!
But now you need to deploy the upgrade features (i.e. version 1511).

Well first you have to deploy a hotfix to your WSUS server (

About this hotfix:

This hotfix enables Windows Server Update Services (WSUS) on a Windows Server 2012-based or a Windows Server 2012 R2-based server to sync and distribute feature upgrades for Windows 10. This hotfix is not required to enable WSUS to sync and distribute servicing updates for Windows 10.

And here it comes:

This update must be installed before you sync the upgrades classification. Otherwise, you might encounter issues when you synchronize and distribute feature upgrades for Windows 10. For more information, see the Important update for WSUS 4.0 (KB 3095113).

Uhhh wait, I did not RTFM…..

At least I can see the updates:

But when I deploy them my clients all come with the message ‘File not found’ (or WSUS error 0x8024200D or 0x80246007). And of course they all report failure back. Nice now everything is Red.

But the fix is easy. The new feature updates are delivered as .esd files. And the IIS instance of WSUS doesn’t know what to do with them. So they are not downloaded!

See in the WSUS console under ‘File Information’

Just go to the WSUS console and add the right MIME-type for .esd.

This is application/octet-stream

Just the Content directory will suffice.

Not even a reboot or anything is needed.

And now the clients are downloading the feature update and installing them!

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