Let met start by confessing I'm a newbie in VMWare and SBS 2011.
I installed two servers (one SBS and one Standard 2008 R2) on an ESXI host. I didn't do anything fancy. My first impression of SBS 2011 is quite positive. Everything works except for WSUS.
It finds all kinds of updates for the Windows Server 2008 and all client computers, but nothing for the SBS server. Here the date of the last update scan still points to the moment of installation two weeks ago. All clients and the other server have a recent date filled in here. All updates have status "unknown". When I try to start windows update manually, the server starts an infinite search.
When I run a few standard reports, the all say WSUS is working perfectly.
What could have gone wrong?