I recently inherited a task of fixing a non-functioning WSUS server running on Windows 2012. Theoretically, there should be about 15 servers checking in, but only 2 domain controllers have appeared so far.
Some of the clients cannot ping the WSUS server, so its possible there's some network communication issues. I've been playing with one that can ping it though to see if I can find something wrong with the WSUS configuration itself.
I'm going through this reference -> cc708627 in the TechNet library (the forum won't let me post the complete URL)
This URL to test the source update tree fails
If I go to the URL for WSUS server address plus port #; I get a "403 - Forbidden: Access is Denied" error
The Update Files configuration option is set to "Download update files to this server only when updates are approved"
Not sure where to go from here.
Paul G.