Can an Edge Server be subscribed to a hub Transport server in a different AD subnet
Posted on 2013-01-04
We are setting up a fail over site to protect an Exchange 2010 server holding the combined roles of HT, CAS and MX.the Edge is on the perimeter network of connected to three different ISP so mailflow at that level is reliable. Of course when the HT+CAS+MBX server fails over it will be in a different AD site. My query is whether we can subscribe the IP for the failed over Exchange, meaning it will be in a different AD subnet from the primary and in effect subscribing 2 different HT IPs to same Edge Server so that mail flows regarless of CAS+HT+MX server state.