Question : SSL Cert for subdomain, when no control over domain (for OWA)

Im trying to get an SSL certificate for OWA to work without IE throwing security errors...

Some details:
- Company has a Win2k3 SBS server hosted with "serverhost.co.uk".  I have full control of server.
- Server FQDN is like "123.123.123.123.sub.serverhost.co.uk". I naturally have no control of serverhost.co.uk
- Company has an existing website "company.com".  I have control of domain (DNS, etc.)

Problem is that:
- IE7 throws security error for OWA "There is a problem with this website's security certificate" every time a user accesses the login page. Firefox does not.
- Importing the self-signed SSL cert in IE7 does not help at all.
- I will be using the same SSL cert for Outlook RPC/HTTP. Self-signed SSL is nothing but head ache for this use.

I have attemped to get a Thawte SSL cert for "123.123.123.123.subdom.hostdom.co.uk" and realized there is no working whois record to match the SSL to.

Question:
Is there a clever way that i could get an SSL cert for a subdomain "email.company.com" and "point" that to the FQDN for the server "123.123.123.123.sub.serverhost.co.uk" ?
The server host OWA on that subdomain only?

Perhaps there is a better way to do this?

Thanks in advance.

Answer : SSL Cert for subdomain, when no control over domain (for OWA)

123.123.123.123.sub.serverhost.co.uk <-- is that a reverse DNS address for the server?

email.company.com just needs to be registered as an A record for the domain, then you'd purchase an SSL certificate reflecting email.company.com. (don't forget to create a certificate request that reflects the FQDN of email.company.com when you create the request).