Hi All, I have a very complex environment and I need your help.Background:I have an exchange 2003 BE and two FE servers with an ISA 2006 box.I have just installed an Exchange 2007 MB/HT on one box and two CAS servers to coexist with the Exc2k3.The two exchange environment are on separate VLANs and all required ports opened up.The two CAS servers have a content switch to load balance the traffic from ISA server.My internal domain name is xyz.local while my external domain name is xyz.com Questions:1. How do I issue a certificate that would enable external access on OWA, ActiveSyc, Autodiscover (note all on .com) and also certficate for internal traffic between the exchange servers (SMTP, IIS, IMAP & POP3) all on .local2. If I choose to only setup SSL between the external client and the ISA box and allow the traffic between the ISA to the CAS server through the content switch on port 80, can I set CAS not to use the self signed certificate.3. Is there any documentation that covers my kind of setup or is it possible for me to achieve the existence of both servers will transitioning users.4. Can autodiscover service work with a content switch which will basically be the load balance IP for the CAS.Thanks Isaac2k2

I can only help with point #1You need to buy a UCC certificate which allows you to put up to 5 names in the cert. That way you specify the local name(s) as well as externalhttp://www.digicert.com/unified-communications-ssl-tls.htm