Article ID: 2003485 - View products that this article applies to.
The Windows Server 2003 and Windows Server 2008 DNS Server may be unable to resolve queries for WPAD 'A' records in zones it hosts (for example, wpad.contoso.com). The following error will be logged in the Application Log:
This behavior is by design. The error indicates that a wpad entry exists in the HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\DNS\Parameters\GlobalQueryBlockList value. The presence of a name in this key prevents any corresponding 'A' records from being returned by the DNS Server.
To allow WPAD entries to be returned, remove the WPAD entry from the HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\DNS\Parameters\GlobalQueryBlockList value by using these steps:
Important: By default, a wpad and isatap value will be present. Do not delete the isatap value.
For more information about configuring WPAD, please see these documents:
(http://go.microsoft.com/fwlink/?LinkId=151500)for other considerations.