Working my way through the Microsoft steps to migrate from SBS2003 to SBS2011. Everything has gone smoothly up to the point of removing Exchange 2003 before demoting the server. When I ran through the first time, it failed due to a service not responding in a timely fashion. Now when I go back through to try again I get constant pop-ups that the NNTP component of IIS is not installed. I've seen the next step is manual removal and have that article.
My question: If this server is being retired immediately and will not be used for anything further, is it possible to just continue on without fully uninstalling the old Exchange?