How to check for the WSUS server settings and GPOs on ConfMgr clients

In order to check the WSUs server that the clients are contacting and also check for any GPOs affecting those clients, you will need to check the following:

- Rsop.msc on the client...
Check the Computer Configuration > Administrative Templates > Windows Components > Windows Update > is it listed the correct WSUs server?
Check also the registry settings under the HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate reg key..

- Compare the below registry keys on a "problematic" machine, with the same registry keys from a “working” machine:
HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\WindowsUpdate
HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\WindowsUpdate\AU

- Follow the below TechNet article:
Troubleshooting Group Policy Configuration for Software Updates https://technet.microsoft.com/en-us/library/bb735866.aspx

- Check if WSUs is defined in the GP (i.e: server name and port) versus how it is set in ConfMgr (i.e. FQDN)

- Check the WUAhandler.log for the WSUs URL used.