When you configure a Windows Vista-based computer to use machine authentication and to validate the RADIUS server certificate, the computer may be unable to connect to the network.

This problem occurs when the following conditions are true:

• When you configure the network authentication method, you click to select the following check boxes:
  • Validate Server Certificate
  • Connect to these servers
• You do not enter any server name in the text box under the Connect to these servers check box.