Looking for some help with a new Exchange 2013 setup.
Currently as a business we have one Exchange 2007 server in production. This server is in our DC and host all the roles. I have been tasked with upgrading to Exchange 2013.
We currently have 3 sites; one office in the UK, DC in the UK and one office in our European office. So I want to place one server in each site (virtual in the two offices and physical machine in the DC). I want a DAG from each office to the DC but not a DAG to between the offices (each office communicates via the DC). I want to setup a highly available solution so that users in each of the office can access the mail servers locally and should either fail, they are able to access the server in the DC to continue getting emails. I am a bit confused of how I can setup the CAS part of this solution. OWA / Active Sync etc is to me made available via the DC for UK users and for the European office they can access it via their local server and failover to the UK if there is an outage (although accessing it from the DC isn't an issue either). The UK office has internet access via the DC, however the Euro office does have its own Internet breakout. If anyone can help I would really appreciate it. Any further info, please ask.