Publishing Cloud Services Appliance (CSA) 4.3 in a ISA 2006 server

I'm trying to publish LANDesk CSA gateway in a ISA 2006 server, and to publish it ISA server requires a SSL listener using a certificate to stablish the internal link with CSA. I don't know how to export the CSA certificate, Is there any procedure to export CSA certificates to be installed in the ISA 2006 server?

Any help will be greatly appreciated.

Thanks.