I am looking to load balance 2 CAS servers without NLB and hardware load balancer because we have the 2 cas server configured with Mailboxes and DAGs.
External load balancing will be done with TMG.
From what I have read internally you can configure round robin DNS for cas where the CAS array would have 2 dns records internally and you would set the TTL to 5 minutes lets say. Is that a viable solutions? Would there be any manual intervention after the 5 minutes? If one CAS server is offline would the client go to the other after 5 minutes?