Another question is about the "Can't convert IP Address of type 0
I know the KB article http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1038790 but I can't belive that we really have to migrate each guest to figure out which guest's are generating those warnings. Can we figure out the guest in any other way?
This powrcli script will help you to get the IPv4 details of the windows VMs. by doing this we can find out which VM has incorrect IP settings.
http://pingforinfo.com/powercli-to-see-the-windows-guest-ipv4-network-details/