Article ID: 971272 - View products that this article applies to.
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You may experience authentication issues browsing http://companyweb on SBS 2003 and SBS 2008 servers after installing the cumulative security update for Internet Explorer (KB963027
(https://support.microsoft.com/kb/963027)) or Internet Explorer 8.0 or Windows Server 2008 Service Pack 2.
When you try to browse Companyweb, you will be prompted for authentication 3 times and eventually receive a blank page or 401.1. Your IIS logs will show your request failing with 401.1 Unauthorized.
You may also notice on SBS 2008 that the Exchange powershell command test-outlookwebservices will fail the test of the autodiscover URL with the the error code 401 Unauthorized. Use Method 3 in the resolution section to resolve the 401 Unauthorized error code in the test-outlookwebservices powershell command.
Note You may experience authentication issues browsing Internal Web site on Remote Web Workplace on SBS 2008 servers after installing the cumulative security update for Internet Explorer (963027) or Internet Explorer 8.0 or Windows Server 2008 Service Pack 2.
You can visit the http://companyweb instead after applying the resolution.
Please use one of the following resolutions depending on the version of SBS you are running.
On an SBS 2003 server this issue can be fixed by applying update KB961143.
Note You must have .NET Framework 2.0 installed before you apply this update.
Apply SBS 2008 Update Rollup 2 (KB960911
(https://support.microsoft.com/kb/960911)) or the latest available version of the SBS 2008 Update Rollup.
On an SBS 2008 server, this issue can be fixed by applying SBS 2008 Update Rollup 2 (KB960911
(https://support.microsoft.com/kb/960911)). This update is now available on Microsoft Update and WSUS (must be approved by administrator).
In some cases, those resolutions may not resolve the issue. In those cases, we recommend users use the following steps to enable Kerberos authentication or specify the host names for NTLM authentication.
Enable Negotiate (Kerberos) option for Sharepoint 3.0. To do this, follow these steps:
Specify host names. To do this, follow these steps:
For steps to disable Loopback Chekcing and additional information see the following article in the Microsoft Knowledge Base:
(https://support.microsoft.com/kb/896861)You receive error 401.1 when you browse a Web site that uses Integrated Authentication and is hosted on IIS 5.1 or IIS 6
For additional information on troubleshooting 401 errors, see the following article in the Microsoft Knowledge Base: 907273
(https://support.microsoft.com/kb/907273)Troubleshooting HTTP 401 errors in IIS
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Article ID: 971272 - Last Review: August 14, 2009 - Revision: 2.0