Windows update not updating
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.I have verified that the machines are in the correct groups in AD and in WSUS.I have verified in the registry on the affected machines that they are pointing to the WSUS server and it can be pinged. There is no firewall or port blocker or anything like that.As much as I don't want to, I am going to have to call Microsoft...Ok, after spending 3 weeks with Microsoft's technical support department we have solved the problem.
WSUS detects and sends updates to all systems, including the 2012 servers.The first thing to do is to stop the Windows Update service on your Windows 7 machine.You can do this by going to Start and typing in in the search box.I have manually gone through the installed updates on one of the servers in question and verified that these "Not Applicable" updates are not installed.All these servers are fresh installs and they are in an OU that prevents them from restarting themselves after an update install and I am the only one who manually restarts them.
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I created a completely new 2016 server installation with absolutely nothing installed on it; no roles, no firewalls no virus scanner no nothing, just a blank server and tried to force it to connect.