I have two sites on IIS7.0. Both sites has different SSL certificate and with same IP and port. When ever i try to change the SSL certificate of one site it effect the SSL certificate of another site. I try changing host header name but it seems SSL does not works on host header name it works only on IP and port. I want to keep the same IP for both sites. Do you any work around? Any help will be highly appreciated.

You can't. SSL doesn't support host headers. It is a 1:1 mapping between sites and IP addresses/port. Therefore if you want to run two SSL sites then you will need two IP addresses. Simon.Simon Butler, Exchange MVP Blog | Exchange Resources | In the UK? Hire Me.