One of the great changes in Exchange 2010 over Exchange 2007 is the ability to combine both CAS & Hub roles on mailbox servers configured as DAG, this gives you the flexibility to have a highly available solution with just 2 servers. Note that you...

In Exchange 2007 we introduced the concept of proxying and redirection to manage the multi sites deployments (Internet facing & Non-Internet facing). In transitioning to Exchange 2010 CAS it’s a must now to use a new legacy Exchange environment with...