In a network environment, you try to use Group Policy to deploy 802.1X authentication settings to a client computer that is running Windows Vista or Windows Server 2008. In this situation, the client computer incorrectly uses the built-in local default 802.1X profile before the Group Policy profile is applied.
This behavior causes the operating system to start authentication based on the built-in local authentication settings. Therefore, the computer connects to the wrong network or fails authentication instead of successfully connecting to the corporate network.
Note: Disconnecting and then reconnecting the network connection, restarting the Wired AutoConfig (dot3svc) service, or restarting the computer will typically enable the authentication to complete successfully.