When you go through the ICEW and get to the Web Server Certificate dialog, you will have 3 choices:
Create.....
Use....
Do not change....
If Do not change.....is ticked and outlined, then you have a certificate installed.
If you create a new one, then use your DNS A record name for the certificate, as in remote.abccompany.com.
To actually view your certificate, open up IIS>Select your server>Right Click on Default Web Site>Properties>Directory Security>View Certificate. If you do not have a certificate, you can create one here. The same cert will be used for all the sites below the default web site as well.
Regards.