I proceeded to stand up my new Exchange 2013 CAS and Mailbox server. Before having a chance to deploy SSL certs and configure the name space. People automatically started to receive SSL errors for the new servers. Autodiscovery does not find these servers and no one has been moved to the new Mailbox server. I have changed the Default Addressbook back to the 2007 servers. What causes people to authenticate to the new CAS servers, prompting with SSL errors?
Thanks in advance