Configure WSUS Update at non AD Environment

Usually in an AD environment, we only need to configure Group Policy to point update source to WSUS to allow GPO members to receive Windows Updates.

However, in the environment without Active Directory, we need to manually modify the registry to point the update source to WSUS server. The link below shows registry keys involved in this registry modification

http://technet.microsoft.com/en-us/library/cc708449(WS.10).aspx