Windows Server 2016 cannot connect to WSUS server

See: http://moonlightsoft.blogspot.com/2016/08/error-0x80244019-occurred-while.html (let it translate) It worked for me! Appearantly the WSUS server has problems when the client needs to download big updates like 1609. After you add the Mime type, it works.

Ok, after spending 3 weeks with Microsoft's technical support department we have solved the problem.

The problem is with Dual Scan trying to connect to Windows Update (online) and failing. When it fails the system just stops trying and refuses to connect to WSUS.

The added problem is the server install media has a bug in it which prevents the Dual Scan from changing. It just ignores the policy and keeps the default update source Windows Update.

Here is what you have to do to fix it: Run the following commands in Powershell on the offending server

$MUSM = New-Object -ComObject "Microsoft.Update.ServiceManager"
$MUSM.Services | select Name, IsDefaultAUService

You will get something back like this:

Windows Update Standalone Installer - False   
Windows Server Update Service - False   
Windows Update - True

If it says "Windows Update - True" Then that is your default source, no matter what your GPO says...

The first thing you have to do is make sure the following patches are installed on your server.

kb4103720 and kb4462928

You need them BOTH. They are both huge, they both take forever and a day to install and they both require a server reboot.

These KBs fix the dual scan issue so the server will respond to the GPO telling it which default source to use.

Now you need to configure Group Policy to tell the server to only use the WSUS server. Per Microsoft these are the required settings (I am dubious on some of them, but I haven't tested each one... I am just happy the thing is finally working)

Computer Configuration > Policies > Administrative Templates > System > Device Installation

Specify the search server for device driver source locations

Set to "Enabled"  
Select search order: "Do not search Windows Update"

Specify the search server for device driver updates

Set to "Enabled"  
Select Update Server: "Search Managed Server"

Computer Configuration > Policies > Administrative Templates > System > Internet Communication Management > Internet Communication Settings

Turn off access to all Windows Update features (In Microsoftspeak that means their online server, not 'make so it can't get updates')

Set to "Enabled"

Turn off access to the Store

Set to "Enabled"

Computer Configuration > Policies > Administrative Templates > Windows Components > Windows Update

Do not allow update deferral policies to cause scans against Windows Update

Set to "Enabled"

No auto-restart with logged on users for scheduled automatic updates installations

Set to "Enabled"

Specify intranet Microsoft update service location

Set to "Enabled"  
Set the intranet update service for detecting updates: "http://[YOUR SERVER]:8530"  
Set the intranet statistics server:"http://[YOUR SERVER]:8530"  
Set the alternate download server: "http://[YOUR SERVER]:8530"  
Uncheck the box Download files with no Url in the metadata if alternate download server is set

Move your servers into an OU with this GPO enabled. I created a separate OU in my Servers OU just for 2016 server and linked this GPO to it.

Run the above powershell commands again.

It should now say

 Name                                   IsDefaultAUService    
-------                                 --------------------------  
Windows Server Update Service              True  
Windows Update                             False

If you get "Windows Server Update Service" True, then it should work!

I hope this helps someone else. This has certainly been a frustrating issue...

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