question

Run the client side script after deleting it from the WSUS MMC Console and see if that fixes it
https://www.ajtek.ca/wsus/client-machines-not-reporting-to-wsus-properly/
If it doesn't, continue down the page for troubleshooting.

Hello Wolfgang,

Thanks for your posting on Q&A.

This was reinstalled to rule out errors here (previously Windows Server 2016)!

Would you mind talking more about this? I want to get more information before moving on.

Please try to share the below registry values on the Windows Server 2019.

HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate

Best regards,
Rita

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Hello @WolfgangBarthel-0178

Can you confirm that WSUS URL is: https://WSUS.local.de

Have you always used port 8531?

What is the startup type of wuauserv ?

Can you share all WU configuration from: HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate

Thanks,

=======================
Juan Sobrado

Hi ,
Thank you for your answer!
I exchanged WSUS in the log for the correct name and the domain name (anonymous).
The same settings work on the other servers (e.g. Windows 2016).

@ ajtek-adam-j-marshall
i will run the scripts and delete from WSUS

Windows PowerShell
Copyright (C) Microsoft Corporation. Alle Rechte vorbehalten.

PS C:\Windows\system32> Stop-Service -Name BITS, wuauserv -Force
PS C:\Windows\system32> Remove-ItemProperty -Name AccountDomainSid, PingID, SusClientId, SusClientIDValidation -Path HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\ -ErrorAction SilentlyContinue
PS C:\Windows\system32> Remove-Item "$env:SystemRoot\SoftwareDistribution\" -Recurse -Force -ErrorAction SilentlyContinue
PS C:\Windows\system32> Start-Service -Name BITS, wuauserv
PS C:\Windows\system32> wuauclt /resetauthorization /detectnow
PS C:\Windows\system32> (New-Object -ComObject Microsoft.Update.AutoUpdate).DetectNow()
PS C:\Windows\system32>

Regards
wolfgang

[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate]
"ElevateNonAdmins"=dword:00000000
"WUServer"="https://WSUS.local.de:8531"
"WUStatusServer"="https://WSUS.local.de:8531"
"UpdateServiceUrlAlternate"="https://WSUS.local.de:8531"
"SetProxyBehaviorForUpdateDetection"=dword:00000000
"SetActiveHours"=dword:00000001
"ActiveHoursStart"=dword:00000006
"ActiveHoursEnd"=dword:00000015
"DisableDualScan"=dword:00000001

[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU]
"NoAutoUpdate"=dword:00000000
"AUOptions"=dword:00000004
"ScheduledInstallDay"=dword:00000000
"ScheduledInstallTime"=dword:00000003
"ScheduledInstallEveryWeek"=dword:00000001
"AllowMUUpdateService"=dword:00000001
"UseWUServer"=dword:00000001
"AutomaticMaintenanceEnabled"=dword:00000001
"DetectionFrequencyEnabled"=dword:00000001
"DetectionFrequency"=dword:00000014

Hello wolfgang,

Please follow this link to check the connection between WSUS Server and the Server 2019 client.
Open the IE Browser on the Sever 2019 and connect to the site. You could download the file without errors if the connection is OK.

Best regards,
Rita

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Hi Rita,

https://<WSUSSERVER:8531>/iuident.cab is not working. But with the following URL
https://<WSUSSERVER:8531>/selfupdate/wuident.cab the connection works. The file can be downloaded.

Best regards,
Wolfgang

Hi Rita,
no, it affects 3 Windows 2019 servers with remote service.
1 of them has updated today.
All other servers Windows 2016 have no problem.

Reset Windows Update

Some DLL's could not be found e.g. muweb.dll.
netsh winsock reset needs a reboot, this is only possible tonight.

Regards
wolfgang

Get rid of
"DisableDualScan"=dword:00000001

https://techcommunity.microsoft.com/t5/windows-it-pro-blog/why-you-shouldn-t-set-these-25-windows-policies/ba-p/3066178

Hi,

the reg entries

[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate]
"ElevateNonAdmins"=dword:00000000
"WUServer"="https://WSUS.local.de:8531"
"WUStatusServer"="https://WSUS.local.de:8531"
"UpdateServiceUrlAlternate"="https://WSUS.local.de:8531"
"SetProxyBehaviorForUpdateDetection"=dword:00000000
"SetActiveHours"=dword:00000001
"ActiveHoursStart"=dword:00000006
"ActiveHoursEnd"=dword:00000015
"DisableDualScan"=dword:00000001

@ Rita
Even after the reboot, the server is not visible on WSUS

Regards
Wolfgang

Get rid of "AllowMUUpdateService"=dword:00000001

https://docs.microsoft.com/en-us/windows/deployment/update/waas-configure-wufb

That's a WUfB policy.