Question : SBS 2008 default website conflicting with SBS Web applications

I have a Windows SBS 2008 Server. I cannot get the default website to start while the SBS web applications site is running. When I try to start the default website it says another site may be using the same port. They both are using port 80 and 443 but port 443 is causing the issue. I tried to edit the bindings on either site and add a host name but it is grayed out on both for port 443.

If I try to change port 443 on either site it says "the certificate associated with this binding is also assigned to another sites binding. Editing this binding will cause HTTPS binding of the other site to be unusable"

In the system log there is an error with event ID 1007 for IIS W3SVC

The World Wide Web Publishing Service (WWW Service) did not register the URL prefix https://*:443/ for site 3. The necessary network binding may already be in use. The site has been disabled. The data field contains the error number.

How can I get both of these sites running at the same time?

Answer : SBS 2008 default website conflicting with SBS Web applications

Ok, now I understand the problem more.  I just read this forum post, and there is a Microsoft rep on there that explains this error you posted:

"There are 2 parts of an "SSL binding" - the host:ip:port information that is in applicationhost.config which is unique to each site (eg: webdav1.example.com:443:ip) and the mappings of an ip:port combination to a server certificate in http.sys configuration which in this case is shared across all your sites using the wildcard certificate - removing the bindings in the UI will remove both those things which will of course make your other sites non-functional - you need to remove just the binding in applicationhost.config using other means like appcmd/editing in notepad etc."

The person that posted the question was then able to resolve the issue by removing the binding by opening applicationhost.config.  So just edit that file and remove the binding for the default web, and you should be good. http://forums.iis.net/t/1149714.aspx