Add Load Balancer backend IP
Load balancers should have a backend IP so traffic can be sent to it to initiate a flow from the other side.
The reason this feature is very helpful is when you're using a Virtual Network Appliance ( VNA ) in HA. HA requires we use load balancers on each side of the VNA ( firewall in this case ). The problem with not having a backend IP the flow from inbound and outbound originated traffic doesn't follow the same path in and out bound.
This leads to some creative solutions that aren't ideal. Really, Azure should be working more diligently on resolving layer 2 issues with firewall vendors so HA firewalls can be used in HA normally without load balancers. Until that happens, we need these features.
Azure Load Balancer Standard supports HA Ports https://aka.ms/haports which allows for flow symmetry when configured as described. Please take a look.
At this time, we have no plans to expand Azure Load Balancer to backends that are not Virtual Machine instances.
Jeremy Wilton commented
You clearly don't understand what I'm asking for, this IS for virtual machines that are being used as Virtual Network Appliances.