thanks however the link you shared talks about multicast routing. In my case, all VMs are in the same Logical Switch so multicast routing is out of question.
The NSX-V logical switch "reproduces switching functionality (unicast, multicast, broadcast)" - see in Add a Logical Switch
Having said that, if nothing is done regarding multicast inside a switch considering the same VLAN, this traffic will be flooded, as the switch has no knowledge about the endpoints that have joined each multicast group. In NSX-T this is treated according to the replication method chosen for the logical switch, which usually means that each packet will be copied to each host that has a VM attached to that particular logical switch.