All of the physical hosts have now been upgraded to Ubuntu 18.10. There were a couple of issues, the upgrade replaced /etc/defaults/nis and turned the NIS servers off. It took me several hours to find and correct that.
Second problem was that some of the old kvm machine types, including the one that our web server used, were no longer supported on the i7-6850 platform. Finally found that and changed the virtual machines to currently supported machine types which actually improve security.
I did not expect to use the entire midnight – 6AM time frame but as it happened got everything back online at 5:50AM so almost went over. If you encounter any problems please use Support->Tickets to generate a ticket. Thank you.