I have done battle with an SBS Server in recent weeks. Some of it was simple fixes, while getting WSUS working and updates generally has been challenging.
The server had not been patched for almost 18 months and the reason was that WSUS was not working and there were some group policies that apparently were disabling connections even for the server.
I have not fully resolved this but one of the key items was this Microsoft TechNet Thread on WSUS Configuration Wizard where I learn that there is a mandated update KB2734608 which resolved the connection issue.
Now that the server is patched and updated, I’ll delve into what the workstations need to get their dose of Windows medicine.