Server tries to download updates from MS instead of configured WSUS server

Question

Hey all,
I got some strange behaviour of a server that I try to update with our WSUS server. Both the client and the WSUS server are Win2k12, not R2. A policy is applied on all servers in which the WSUS server is set. Actually, the update procedure and the policy
works on all servers but this one.
I am able to find and select updates for the target server on my WSUS server and the server is able to find the server. When I try "Install now" on the target server, nothing happens. According to the log the server is communicating with the WSUS
server, but is not downloading the updates from it, instead it tries to download them from MS itself what is not possible. I inserted my proxy user and then it worked so I nailed it down.
How can I reset all the configuration or where is the registry key that leads to the download source?
Thanks in advance and kind regards,
Azreth

Answer 1

The registry keys for the update source are controlled by the group policy, so configuring the policy and making sure it is applying correctly will automatically configure the appropriate registry keys.  However, the keys specific to windows updates
are located here:
HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\WindowsUpdate
WUServer
Reg_SZ
HTTP(S) URL of the WSUS server that is used by Automatic Updates and API callers (by default). This policy is paired with WUStatusServer, and both keys must be set to the same value to be
valid.
WUStatusServer
Reg_SZ
The HTTP(S) URL of the server to which reporting information is sent for client computers that use the WSUS server that is configured by the WUServer key. This policy is paired with WUServer,
and both keys must be set to the same value to be valid.
The full list of related keys can be found here: http://technet.microsoft.com/en-us/library/dd939844(v=ws.10).aspx