I am in the same boat -ish. One of my standalone hypervisors crashed softwarewise, and I've reinstalled it with Hyper-V 2016 of course, that's the way to go now. This machine only hosts a few testvm's and one management VM. My Veeam machine is still 2012R2 but I can't add the new 2016 host to it. For no role at all it seems. Can we enroll in the beta program (although I think it's already in RTM) through support? While I know Veeam is one of the first to support 2016, it's still just a few days late in my situation.