Microsoft KB Archive/933860

= DFS failover does not occur when a client computer that is running Windows Vista tries to connect to a DFS root server that is unavailable, and you receive an error message: &quot;System error 1214 has occurred&quot; =

Article ID: 933860

Article Last Modified on 12/4/2007

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APPLIES TO


 * Windows Vista Home Basic
 * Windows Vista Home Premium
 * Windows Vista Ultimate
 * Windows Vista Business
 * Windows Vista Enterprise
 * Windows Vista Home Basic 64-bit Edition
 * Windows Vista Home Premium 64-bit Edition
 * Windows Vista Ultimate 64-bit Edition
 * Windows Vista Business 64-bit Edition
 * Windows Vista Enterprise 64-bit Edition

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SYMPTOMS
If a domain's Distributed File System (DFS) root server is unavailable, a client computer that is running Windows Vista cannot connect to another DFS server that is listed in the referral when the client computer tries to connect to the DFS root server. DFS failover does not occur. When the client computer tries to connect to the offline DFS server, you receive an error message that resembles the following:

System error 1214 has occurred. The format of the specified network name is invalid.



CAUSE
This problem occurs because the NetBIOS over TCP/IP (NetBT) layer returns an incorrect code. This code does not trigger a DFS failover in the DFS client engine.



Windows Vista
http://www.microsoft.com/downloads/details.aspx?FamilyId=B729A48F-19F3-4394-A788-E60F837FF3F4

Windows Vista x64-based System
http://www.microsoft.com/downloads/details.aspx?FamilyId=C2C9623A-23B9-47DB-ADE3-26B78BF1E1FB

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 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 must restart the computer after you apply this hotfix.

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

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
A similar problem may occur when you use offline file synchronization in Windows Vista. When you access offline files on a client computer that is not connected to the DFS root server, you receive an error message that resembles the following:

Windows cannot find \\ \ \. Check the spelling and try again.

For more information about the terms that are used to describe software updates, 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

Keywords: kbbug kbfix kbqfe kbpubtypekc kbhotfixserver KB933860

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