I have test in lab and believe this is true. I success build windows NLB with ESXI Intel network adapter (1G). But same settings I fail at vmxnet3 adapter.
I ask at Microsoft communities, I don't get help.
So I try to ask at here, does VMWARE can have some analysis in package level to support it?
From the Microsoft VM can you ping another VM? This is for test the correctly functionality of Network Adaper on the VM.
I try to simulate in my lab your issue and I'll try to give you a answer (VMware side)...I must have some specifics:
NIC --> vmxnet3
How many NIC on the ESXi Node?
NLB is the feature of Network Load Balancing on Microsoft ..is correct?