We have a hosted exchange environment setup for a few of our customers but we are having issues with the auto discover service.
We have setup a CNAME record that points autodiscover.domain1 to autodiscover.ourdomain. and everything works except when we go to add another mailbox to Outlook (eg a shared mailbox like Sales/Support etc). The error " The name cannot be resolved. The name cannot be matched to a name in the address list" comes up. Also when Outlook loads they get a security error "The name on the security certificate is invalid or does not match the name of the site". We have a wildcard certificate so we can have anything.ourdomain. When you look at the error it is looking for autodiscover.domain1 on the certificate and not the resolved address.
When we take the CNAME away it removes the certificate error but as well as the other error the Out of Office says exchange is unavailable and downloading offline address book fails.
Each customer has their own GAL and address book policy.
If you need any other details let me know!
Thanks in advance, I've always found great advice on these forums!