I have a windows update server installed in a windows 2008 r2 64 bit server WSUS 3.0with an automatic approval rule for Critical and Security Updates. The Updates look that they synchronize and they are all approved.
My problem is that even when I set the servers/workstations for automatic updates. The Windows Updates in the servers/workstation shows that they have not been updated since January 2011. My updates server is synchronized, the servers/workstation show as connected to the WU-SERVER but no update on the history of the server/workstations.