We want to move to 2012 AD Activation for our network as we're slowly migrating to 2012 from mostly 2008 R2, but if we do, will the 2008/2008 R2 servers already in use/activated still need the KMS we currently have? I'd prefer not to have 2 activation servers, and i thought the KMS activated servers still need to check in every 30 days to stay activated. Can i remove the KMS server used by my 2008/2008 R2 servers and get away with it - and just worry about the AD Activation server for my new 2012 servers? or do i need to get the KMS server up and running with 2012 support? prefer to ditch KMS and go AD activation without worrying about the 2008 boxes if its possible. thanks.