I've been playing a bit with WSUS on the SBS 2008, and found that it onlly shows the status of 10 computers inside the SBS console. The status of the rest is unknown. If i go to "windows server update services" it is the same 10 computers that show up under all computers.
I then tried to use the command wuauclt /resetauthorization /detectnow on a computer that doesn't show up. The result is, that the new computer shows up and another on dissappears. So I still only have the status of 10 computers. It seems like a limitation. Can I have WSUS to show all my 15 computers?