DOCUMENT:Q156409 15-MAR-2000 [iis] TITLE :Basic Authentication Prompt Before NT Challenge/Response PRODUCT :Internet Information Server PROD/VER:winnt:1.0 OPER/SYS: KEYWORDS:kbenv kbinterop ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Internet Information Server 1.0 ------------------------------------------------------------------------------- SYMPTOMS ======== If you select both Basic (Clear Text) and Windows NT Challenge/Response authentication from WWW Services properties and try to access the web server from a client logon to the Internet Information Server's domain, the web client should use the client logon credentials from the cache. However, a Username Password dialog box will appear on the web client. CAUSE ===== If you select both Basic (Clear Text) and Windows NT Challenge/Response authentication from WWW Services properties, Internet Information Server should try to authenticate with Windows NT Challenge/Response authentication first. If that fails, Internet Information Server should try to authenticate with Basic (Clear Text). However, it is a known problem that Internet Information Server executes this sequence in reverse order. STATUS ====== Microsoft has confirmed this to be a problem in Microsoft Internet Information Server version 1.0. This problem was corrected in Microsoft Internet Information Server version 2.0. Additional query words: ====================================================================== Keywords : kbenv kbinterop Technology : kbiisSearch kbiis100 Version : winnt:1.0 ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 2000.