Crashing lsass.exe on your shiny 2012r2 DC? It’s a known bug according to PSS. You have three choices. a) use a different DC to rename things. b) turn of all auditing on the DC (seriously) c) apply a hotfix that you can only get from PSS.
Personally, I’ve gone for option “a”. We need the auditing and option c had a number of “it’s your fault if it breaks” warning attached to it that scared me a little. I’ll await the real patch which apparently will be “soon”. THough that’s in Microsoft Minutes so don’ hold your breath….