Hello everyone,
first of all: I'm new to Exchange (2013) servers and I don't know much about it, but I'm willing to learn more. ;-)
What I understood by now is that the CAS and mailbox role should be installed on the same server. They can be installed separately but everyone seems to recommend to install them on the same server. I'm fine with recommendations! They lead the way to a working environment.
But now I'm confused. My company offers to connect to the OWA via the internet. So there must be a server with a public IP address. (We don't have a load balancer and please to recommend using one! I know that hardware load balancers are a good thing, but ... internal politics, money etc.) But I don't want to expose a server with mailboxes to the internet - if every Exchange 2013 server has the CAS and mailbox role.
How should a infrastructure look like if we want to follow the recommendations, have external access to OWA and don't want to have a server with mailboxes and external IP (and as I mentioned before NO load balancer, maybe DNS RR).
I'm grateful for every answer (that doesn't include a load balancer)!
Matthias