Hi,
Currently, we have 3 exchange servers with all roles installed. Currently the 3 are licensed with a standard license.
We are looking to upgrade to Exchange Enterprise to gain access to the extra database numbers for our DAG.
We also want to create two new servers for the CAS roles to create a CAS Array.
This would leave us with 3 x exchange server Enterprise for the DAG
and 2 x Exchange servers for the CAS. Will the CAS servers also need to be enterprise edition of exchange?