I work at a school where we have about 30 iMacs and several MacBooks. I am getting a new image ready for testing based on Sierra and I have come across a problem with wifi. It will not connect to a network automatically at the login screen. This is absolutely necessary since these machines are bound to an AD server. The problem only occurs after boot. If I login with a local account, it connects to wifi automatically. When I logout, it stays connected. Is this related to the other wifi issues 10.12 is having or is this something different?