I have modified GPO to point to Windows update server to WSUS.
It can detect Windows update but I can't lookup from WSUS.
Configuring the GPO is only part of the solution.
The GPO also has to be applied to the target system. If the client is not functioning as a WSUS client, that strongly suggests that your GPO has not been
applied correctly.
Lawrence Garvin, M.S., MCSA, MCITP:EA, MCDBA
SolarWinds Head Geek
Microsoft MVP - Software Packaging, Deployment & Servicing (2005-2014)
My MVP Profile: http://mvp.microsoft.com/en-us/mvp/Lawrence%20R%20Garvin-32101
http://www.solarwinds.com/gotmicrosoft
The views expressed on this post are mine and do not necessarily reflect the views of SolarWinds.