Since ages:
NFS = Not For Security

Incase anyone else has this problem - It seems to have resolved it self.

The image I mention above was never sysprepped. I sysprepped it, uploaded it as multiple partition - single disk, and it worked fine multicast. After that I noticed the hidden partition shrunk from 500mb to 100mb. I figured I’d try uploading it as NTFS resizable - and go figure, it works fine multicast now.

Odd

+1

😉

Any attemp to multicast on network switches that do not have IGMP Snooping will cause network flooding of broadcast packages. IGMP (Internet Group Management Protocol) settings should be found on your switches.

I would use DNS to point the clients to the correct IP Address in that Network.