Question : How many SSL certificates we need

My client has SBS running RWW using https port 443, the same server using https port 444 for the SharePoint and other server using https port 89 for the second SharePoint. How many SSL certificates do we need? For example, if our domain name is domain.com. The 3 SSL sites will be https://domain.com, https://domain.com:444 and https://domain.com:89. Does one certificate is good enough these SSL sites?

Answer : How many SSL certificates we need

As you have just one domainname, and only ports differ, one SSL certificate should be enough.