Again the old well-known problem. When using Outlook trough RDP over HTTP the following message pops up: "the security certificate is not from a trusted certifying authority".
Our environment set on a Windows SBS 2011 standard and certainly Exchange 2010. I also need to mention that OWA is working, Outlook over TCP also works, doing a test with https://www.testexchangeconnectivity.com
ExRCA is attempting to build certificate chains for certificate CN=outlook.domain.com.
A certificate chain couldn't be constructed for the certificate.
The certificate chain couldn't be built. You may be missing required intermediate certificates.