I have prototype load balancing on my Exchange 2019 mailbox servers (2 servers in one DAG) using the free nginx edition using streaming capability. I am aware that this is only a Layer 4 solution and therefore does not terminate the connection or perform any traffic inspection. I agree with this limitation. However, some colleagues have advised against the use of nginx, but have no reason to offer that it is not "free nginx does not work with Exchange" (which is at least somewhat bogus). Will I have problems in the future? Should i use haproxy or Kemp LoadBalancer? My main priority is stability / reliability. Well I guess my top priority is price (I have little or no budget for this).