I am attempting to install Sharepoint 2007 and Exchange 2007on the same Windows 2003 R2 server. I have both apps installed, but I can only get one of them working at a time. I installed Exchange first and it was working fine with a host header. Then I installed Sharepoint Server 2007, and it disabled the default website where exchange owa was installed. When I try to reenabled the default website, it gives me a port conflict error. When I add a host header to the sharerpoint - 80 website, then the sharepoint site doesn't work. I also tried extending the sharepoint site with a host header and that didn't fix anything. Since got "page cannot be displayed. I have seen solutions for fixing this issue with 2003 apps, but not with 2007. Please advise.