I have a domain called mydomain.local and there are three servers - AD Server MyFile1.mydomain.local - Email and IIS Server MyMail.mydomain.local and an ISA Server Gate1.mydomain.local. All 2003 based including the Exchange server on Mymail.mydomain.local. I have purchased a SSL certificate with host and common name of remote.mydomain.com and installed it on the IIS(6) server and can use SSL Forms authentication by entering https://mymail/exchange
. I have added a DNS Zone on the DNS Server MyFile1 called remote.mydomain.com and in this zone, I have added a host record pointing remote.mydomain.com to the ip address of mymail1 which is 10.9.2.3, and interally i can resolve this via a ping from all three servers to MyMail server. But I cannot enter https://remote.mydomain.com/exchange and get the forms page up. I get error 400. Can anyone off some advice. My aim is to authenticate using this certificate for external OWA clients and mobile, active sync.