We have a DAG setup with two servers that both run Autodiscover, CAS, HUB and MBX roles. Each server is configured with its own FQDN for RPC/HTTP, OWA, EWS and so forth. I want to try to anticipate what will happen if a server goes down with the current config without any type of HA, or NLB implemented. For instance:
When a client contacts autodiscover on say, server1 will server1 return both CAS servers or just itself?
If it returns both, how does the Outlook client choose which one to use?
If one of the servers goes down the failed database is activate on the other server. However given situation above, what if anything do I need to do to make sure clients connect to the remaing CAS server?
Thanks,
Diego
Rgds, Diego