Over the last week I have had what would appear to be DNS issues appearing in our network.
Names have always resolved with no problems then it would seem out of know where they have started to not.
It appears to be random as to who is unable to connect to another PC on the network by name but the number of users appears to be growing.
They can connect by IP address no problem.
My DNS knowledge is pretty limited so don't want to go looking at settings and making thins worse.
Any ideas as to what could be causing this?
The only change I can think of is that a few months we upgraded our DCs from 2003 to 2012, could this be the issue and it is only coming to the surface now or would it of happened instantly?