if your Kerberos authentication fails together with the error code 0X80090302 or 0x8009030f on a computer that is running Windows Server 2008 or Windows Vista when the AES algorithm is used, 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.
so to solve this out, download and install this hotfix: http://support.microsoft.com/kb/969083