I know...this sounds like a really stupid question when I read it out loud. We recently purchased another license for VSphere 5 for a new host we are going to be adding into our VM Cluster. Our existing hosts are at the 5.0.0,623860 patch level and from what I have been reading on here I am not sure I want to roll out the 5.1 update at this point.
I can't remember, but I would assume a 5.0 key would work with 5.1 and vice versa?