Friday, December 3, 2010

An authentication error has occurred (Code: 0x507) SOLVED

"An authentication error has occurred (Code:0x507)" this kind of error you might have faced, usually you will get this error when you are accessing Windows Server 2008 OS remotely from Windows XP SP2 or SP3 ,Windows 7,Windows Server 2003, this error wont allow us to connect remotely, this happens because of NLA,and some Registry disturbance in local desktop, The solotion for it is:
1. Try to login with different user in that system where you used to code 0x507 error.
2.After login with other user name try to access remote of windows server 2008.
3.Now you can access Windows Server 2008.

Use the following steps if the above wont works for you.

1.Just rename the existing profile in that system.
2.Login with your id now and take Windows Server 2008 remote it will work fine.

Post comments if you got any issues

All The Best!!


  1. Hi There, You may like to check this one for step by step solution.

  2. i tried all those setting but i am not able to access RDP Server 2008

  3. Wrong Way ........
    unable to connect

  4. Problem is with security layer which is set up to "negotiate" by default. This option is in RDP TCP properties General Tab. Security layer need to be chancged to "RDP security Layer" Encryption Type: "Client Compatible" .

  5. I fixed this issue by going into the registry/local machine/system/control (the 3rd option/lsa/ security packages and add TSPKG, save reboot and worked perfect.