I have a 2008r2 functional domain and I have all 2012 r2 domain controllers. I cant seem to find out what the real ramifications are for raising the functional levels to 2012 from 2008 r2. I read that ntlm is no longer used. Is that true and what issues does that bring. I am running a 2010/2016 hybrid exchange converting to 365. Until now I really didn't have anyone to ask these questions to. So can you help ?