I have one web application in which I have two external sites :
- Mydomain.co.uk -internet zone
- mydomain.com-intranet zone
And I have two certificates available with me which I purchased for this two external website :
I can only able to apply one certificate on port 443(Mydomain.co.uk).
Both the sites (Mydomain.co.uk, mydomain.com) are fetching the certificate which is applied on 443 ports (https).
Therefore only one site is working fine (the certificate which is assign to port 443, only that site will work).
So initially I have applied mydomain.co.uk certificate on 443 then mydomain.co.uk site is working fine and mydomain.com is having a Certificate error (it is pointing to mydomain.co.uk certificate.)
These certificates issued by Certificate Authority.
I have also tried by creating an extended web application but no success.
Note : I have a single IP address.