Microsoft KB Archive/940248

= Error message when a user accesses a SharePoint Web site that is published in ISA Server 2006: &quot;HTTP 401 Unauthorized&quot; =

Article ID: 940248

Article Last Modified on 8/14/2007

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APPLIES TO


 * Microsoft Internet Security and Acceleration Server 2006 Standard Edition
 * Microsoft Internet Security and Acceleration Server 2006 Enterprise Edition

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SYMPTOMS
When a user accesses a SharePoint Web site that is published in Microsoft Internet Security and Acceleration (ISA) Server 2006, the user receives the following error message:

HTTP 401 Unauthorized

This problem occurs when the following conditions are true:
 * In the Web listener that the SharePoint Web publishing rule uses, the following authentication methods are configured:
 * HTML Form Authentication
 * LDAP (Active Directory)
 * The Web client sends a POST request to the SharePoint Web site.
 * The URL of the POST request contains extended characters. For example, the URL contains é, à, or è.



CAUSE
This problem occurs because ISA Server cannot parse a URL that contains extended characters. In this case, ISA Server rejects the POST request that the client sends.



RESOLUTION
To resolve this problem, follow these steps:  Apply the hotfix that is described in Microsoft Knowledge Base article 940250. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

940250 Description of the ISA Server 2006 hotfix package: July 16, 2007

  Copy the following script into Notepad: Const SE_VPS_GUID = &quot;{143F5698-103B-12D4-FF34-1F34767DEabc}&quot; Const SE_VPS_NAME = &quot;CookieFilterDecodeUEncoding&quot; Const SE_VPS_VALUE = true

Sub SetValue

' Create the root obect. Dim root ' The FPCLib.FPC root object Set root = CreateObject(&quot;FPC.Root&quot;)

'Declare the other objects needed. Dim array      ' An FPCArray object Dim VendorSets ' An FPCVendorParametersSets collection Dim VendorSet  ' An FPCVendorParametersSet object

' Get references to the array object ' and the network rules collection. Set array = root.GetContainingArray Set VendorSets = array.VendorParametersSets

On Error Resume Next Set VendorSet = VendorSets.Item( SE_VPS_GUID )

If Err.Number <> 0 Then Err.Clear

' Add the item Set VendorSet = VendorSets.Add( SE_VPS_GUID ) CheckError WScript.Echo &quot;New VendorSet added... &quot; & VendorSet.Name

Else WScript.Echo &quot;Existing VendorSet found... value- &quot; & VendorSet.Value(SE_VPS_NAME) End If

if VendorSet.Value(SE_VPS_NAME) <> SE_VPS_VALUE Then

Err.Clear VendorSet.Value(SE_VPS_NAME) = SE_VPS_VALUE

If Err.Number <> 0 Then CheckError Else VendorSets.Save false, true CheckError

If Err.Number = 0 Then WScript.Echo &quot;Done with &quot; & SE_VPS_NAME & &quot;, saved!&quot; End If       End If    Else WScript.Echo &quot;Done with &quot; & SE_VPS_NAME & &quot;, no change!&quot; End If

End Sub

Sub CheckError

If Err.Number <> 0 Then WScript.Echo &quot;An error occurred: 0x&quot; & Hex(Err.Number) & &quot; &quot; & Err.Description Err.Clear End If

End Sub

SetValue  Save the file as a Microsoft Visual Basic script file by using the .vbs file name extension. For example, save the file by using the following name:

EnableKB940248.vbs

 At a command prompt, move to the location where you saved the EnableKB940248.vbs file. Run the following command:

cscript EnableKB940248.vbs



Note After you follow these steps, only the query part of the URL can contain extended characters. The query part follows the question mark (?) in the URL. The part that comes before the question mark in the URL cannot contain extended characters even after you use this resolution.



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.

Keywords: kbtshoot kbexpertiseinter kbprb KB940248

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