SSL Certificate from external CA

Hi,

we have ordered a SSL certificate from trusted external CA to our whole domain - e.g. *.ourdomain.com.

On our Domino server we have our own CA. Now, I need to somehow import that new certificate into our Domino.

I know that correct way is to create certificate request, let CA create certificate based on that request and finally merge that certificate with server keyring file. But now I need to import just that certificate for whole domain. Is that possible and how?

TIA, JiKra