After the FCU all of my hyper-v VMs were missing from the hyper-v manager. They were still on my hard drive and when I tried to import them they all stopped the import with an error. I was able to get them back by re-importing them into new folders with a new ID. Is there something I could have done that would have been less time consuming and not mess with activation?
I did not have this issue... Did you go from 1703 to 1709? Or did you upgrade from a different release?
I went from 1703 to 1709. Scared the hell out of me when I looked in the VM manager and it was empty.