Im looking to setup 2 exch2013 servers as active / passive DAG across AD sites - and implement HA/failover.
ServerA (active) in site 1 (primary site)
ServerB (passive) in site 2 (secondary site)
I want to set these up as stretch DAG. And have across site failover / resilience.
Questions:
First, will this design work? 400 user mailboxes. Is there a better design?
Which site should the FSW (file witness) be in?
How will other sites access serverB if Site 1 goes offline. DNS round robin? I hear this is slow. Whats best practice for re-routing users to site2 ?? Options?
I've used Load balancers in 2010 but they say thats not needed in 2013. - true? Because its active passive, I guess there is no CAS array?
Help?