Getting ready to upgrade a 2003 functional level Domain with both 2008SP2 and 2003 Servers to 2012R2. My questions is in regards to a couple of NT4 and 2000 Client OS that just can’t go away. Do I need to leave a 2008 Sp2 or R2 Server in place to perform authentication for these devices? I understand that 2012 will not support them. But if I leave the functional level at 2008 SP2 or R2 would I need a 2008 server in place to handle those Computer object authentication request or will the 2012 do it but just not in 2012 native mode? I am sorry if this is convoluted but I can’t seem to find anything really definitive and I don't have time to build a lab. Thanks for any assistance.