Currently in the process of implementing Exchange 2013 to migrate from Exchange 2007. Am planning on having two multi-role 2013 servers at production and at least 1 multi-role 2013 server at DR site. Obviously I will be using DAGs to provide HA for the mailbox role, but want to have HA for the CAS role as well before I configure everything for co-existence with Exchange 2007. Eventually I plan to have a hardware load-balance like a Kemp LM-2400 or Netscaler, but for now I will have to settle for DNS Round Robin.
In reading some articles on DNS RR and Exchange 2013 CAS servers, they've only been referencing examples with Outlook Anywhere and OWA and how you need to use the same namespaces for Outlook Anywhere and OWA (e.g. mail.domain.com) on both servers, but what about the other virtual directories like ECP, EWS, Active-Sync, and OAB? Currently I have just one Exchange 2013 CAS and their namespaces all begin with mail.domain.com, should both CAS servers be identical? Do I need to change the Service Connection Point to be the same on the 2nd CAS as well?
Thanks in advance for your input.