Looking at implementing a second exchange server for redundancy, i was thinking of implementing CAS / DAG array.
did a bit of a google and lots of things on setting DAG / CAS array up and youtube shows from clean install. so my question is.
Anyone setup a CAS / DAG on a live 2010 exchange server 2008 R2. if experienced any off side problems and what to expect kind of thing would be handy.
should even bother with CAS or just stick with DAG and ? and let DNS do connecting via mailbox roles and not worry about CAS as its mostly for load balancing which isnt required.