Err Msg: 1326: Logon failure : Unknown Username or Bad Password (194705)

SYMPTOMS

If you are using a proxy array, your may receive the following error message if the proxy array is misconfigured:

1326 : Logon failure : unknown username or bad password

CAUSE

This error occurs under the following conditions:

The default Web site has Basic (Clear Text) enabled.(NTLM is not enabled.)
On the Web Proxy properties Routing tab, when you click the Advanced button, a valid administrator account is selected for all array members.
"Allow encrypted authentication (NT CR)" is selected.
Access Control on Web Proxy is enabled.
Your browser is configured to use one of the array members as a proxy server.

NOTE: If you are using the automatic configuration URL http://servername/ array.dll?Get.Routing.Script, then this article does not apply to you.

When you browse to an Internet site, you should be prompted with a Basic Authentication box. When you input a valid user name that exists in the proxy Access Control List for WWW and press <enter>, you will get the following error message:

1326 : Logon failure : unknown username or bad password

WORKAROUND

To work around this problem, perform the following steps:

On one of the proxy array members, open the Web Proxy properties, click the Routing Tab, and then click the Advanced button.
Input a valid administrator account to all proxy array members.
Select "Allow basic/clear text authentication."
Apply your changes.

The changes will be applied to all proxy array members.