Hi,
I am planning to migrate Exchange 2010 to Exchange 2013 for 15000 users. We have a pool of 6 CAS 2010 servers added in a single CAS array. So my question is if we introduce a new CAS 2013 server in same site then will it affect CAS traffic anyway ? If we point our HLB to all CAS servers including CAS 2010 and CAS 2013 so will the CAS 2010 servers wil take traffic or is it only CAS 2013 servers who will take traffic. We will be putting same URLs in CAS 2013 same as CAS 2010. I have read lot of MS articles and all say that CAS 2013 should be enabled for CAS traffic and it will proxy request to CAS 2010. But I am not sure if we will face any CAS traffic issue whenever we will introduce CAS 2013 servers in same site and traffic will be pointed to CAS 2010 and CAS 2013 both. Is it possible to add CAS 2013 in Exchange 2010 CAS array ? Please guide. Thanks in advance.