HAProxy and Exchange
HAProxy configuration for Windows Exchange Server 2016/2019
Load Balancer for Exchange 2019, 2016 and 2013 with HAProxy
Exchange 2013/2016: Switching from Zen Load Balancer to HAProxy
Load Balancing Microsoft Exchange 2016
Exchange Client Access services
Load Balancing in Exchange 2016
Microsoft Exchange 2013 Load Balancing with HAProxy