Wsus group membership not updating
Bold names are ones that you may set yourself (the others are default groups that you do not want to use).Before you can set any Group Policy options for WSUS, you must ensure that the latest administrative template has been loaded on the computer used to administer Group Policy.Administrative templates files are stored by default in the %windir%\Inf directory.
Log on to a machine on your network that’s a member of the WSUS Testing group as a local administrator, open Windows Update in the Control Panel and click Check for updates.
If the computer you are using to configure Group Policy does not have the latest version of Wuau.adm, you must first load it by using the following procedure.
To add the WSUS Administrative Template: Download the Template The settings for this policy enable you to configure how Automatic Updates works.
After you set up a client computer, it may take a few minutes before it appears on the Computers page in the WSUS console (this console is available to admins running their own WSUS server, but not for admins who point their clients at the CITES WSUS server).
For client computers configured with an Active Directory-based GPO, it can take about 20 minutes after Group Policy refreshes (that is, applies any new settings to the client computer).