It does. You have to enter your DVD-key when you install the game and then it will "call home" the first time it is run. However, there might be an explanation for your lack of DRM - are you, perhaps, from Russia or the owner of a Russian copy?
Well, the SecuROM driver might need to be re-installed by NWN 2, something that would likely happen the next time you inserted the disc and ran the game, but other then that nothing that I can think of.