Microsoft KB Archive/943451

= You cannot access a network share on a Unisys MCP server from a Windows Vista-based computer by typing a UNC path that does not include the share name =

Article ID: 943451

Article Last Modified on 10/23/2007

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APPLIES TO


 * Windows Vista Enterprise 64-bit Edition
 * Windows Vista Ultimate 64-bit Edition
 * Windows Vista Business
 * Windows Vista Business 64-bit Edition
 * Windows Vista Enterprise
 * Windows Vista Ultimate

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SYMPTOMS
Consider the following scenario:
 * You have a server on a network that runs the ClearPath MCP operating system from Unisys.
 * On this network, the credentials that users use to access the MCP server differ from the logon credentials that they use to log on to the domain.
 * A user accesses a network share on the MCP server by using a Windows Vista-based client computer.
 * To access this network share, this user types the Uniform Naming Convention (UNC) path of the MCP server.

In this scenario, Windows Vista does not enumerate the share list on the server. However, if the user accesses a network share on the MCP server by typing the Uniform Naming Convention (UNC) path together with the share name, the user can access the network share.

For example, if the user tries to access the share by typing the following UNC path, the user cannot obtain the share list on the server:

\\

However, the user can access the share by typing the UNC path together with the share name, as in the following example:

\\ \

Notes
 * In these examples,  and   represent one of the following:
 * The fully qualified domain name (FQDN) of the server
 * The IP address of the server
 * The NetBIOS name of the server
 * This issue does not occur on a Windows XP-based client computer.



CAUSE
The Unisys MCP server does not support Remote Administration Protocol named pipes. Therefore, Windows Vista has to create a new connection to enumerate the share list. To do this, Windows Vista uses the user's logon credentials instead of the credentials that user types when they map the network drive. However, in this situation, the credentials that user types when they map the network drive are required. Therefore, this problem occurs.

In the same situation, Windows XP uses the credentials that user types when they map the network drive. Therefore, this problem does not occur on a Windows XP-based computer.



Hotfix information
A supported hotfix is now available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Windows Vista service pack that contains this hotfix.

To resolve this problem, submit a request to Microsoft Online Customer Services to obtain the hotfix. To submit an online request to obtain the hotfix, visit the following Microsoft Web site:

http://go.microsoft.com/?linkid=6294451

Note If additional issues occur or any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. To create a separate service request, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Prerequisites
No prerequisites are required.

Restart requirement
You have to restart your computer after you apply this hotfix.

Hotfix replacement information
This hotfix does not replace any other previously released hotfixes.

Registry information
To use this hotfix, you do not have to make any changes to the registry.

File information
The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.

Windows Vista, 64-bit versions


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



MORE INFORMATION
For more information about named pipes, visit the following Microsoft Web site:

http://msdn2.microsoft.com/en-us/library/aa365590.aspx

For more information, click the following article number to view the article in the Microsoft Knowledge Base:

824684 Description of the standard terminology that is used to describe Microsoft software updates

The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.

Keywords: kbfix kbqfe kbpubtypekc kbexpertiseadvanced kbhotfixserver KB943451

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