Consider the following scenario:

• You have two computers that are running Windows Server 2008 or Windows Vista. One computer sends a Kerberos authentication message to the other computer.
• The Kerberos authentication uses the Advanced Encryption Standard (AES) algorithm to encrypt and decrypt the authentication data.

In this scenario, the Kerberos authentication fails together with the error code 0X80090302 or 0×8009030f, and you receive an error message. However, the error message that you receive may vary for different applications. For example, if you try to connect to SQL Server 2005 or SQL Server 2008 Analysis Services by using Excel, you receive one of the following error messages:

Message 1

The Function requested is not supported

Message 2

The message or signature supplied for verification has been altered

Advanced Encryption Standard: A block cipher adopted as an encryption standard by the U.S. government, also known as Rijndael.

On a Windows Vista-based computer, consider the following scenario:

• You use Wi-Fi Protected Access (WPA) together with Advanced Encryption Standard (AES) encryption to access wireless networks.
• A computer certificate is configured correctly on the computer.
• The computer has the correct permissions to access wireless networks.

In this scenario, you can see that a wireless network is available in the Connect to a network dialog box in the Network and Sharing Center. However, you cannot connect to the wireless network.

On a Windows Vista-based computer, consider the following scenario:

• You use Wi-Fi Protected Access (WPA) together with Advanced Encryption Standard (AES) encryption to access wireless networks.
• A computer certificate is configured correctly on the computer.
• The computer has the correct permissions to access wireless networks.

In this scenario, you can see that a wireless network is available in the Connect to a network dialog box in the Network and Sharing Center. However, you cannot connect to the wireless network.