You are planning to secure your main domain and all its SANs? Then with the Comodo Premium SSL wildcard SSL certificate, it is very easy. This SSL certificate will protect www.yourdomain.com and all its associated SANs (Subject Alternative Names) such as mail.yourdomain.com, owa.yourdomain.com, etc. This product is an Organization Validated (OV) certificate and thus will increase the trust in your website thanks to the activation of "https", the padlock icon next to the URL, and the Comodo Site Seal, which will show the company details when a user clicks on it. This wildcard SSL certificate is a very good solution for companies and ecommerce sites that are willing to increase the trust of their users.