User migrated config from VRRP-E to VRRP and Microsoft Network Load Balancing Stopped Working.
Unable to make Microsoft Load balancers work using NLB Multicast Mode after migrating from VRRP-E to VRRP.
Also there are two articles that addresses it, but it is for VRRP-E:
Article Number : 000002864 - Does VDX support Microsoft Network Load Balancing (NLB) in multicast mode and unicast mode?
Article Number :000002722 - Unable to deploy Microsoft Load balancers solution using NLB Multicast Mode (Need Static ARP Resolution)