FIX: Error message when you access an NFS share from a computer that is running Windows Vista SP2 or Windows Server 2008 SP2: "Incorrect Function. Access Denied"

Consider the following scenario:

• You install the Client for NFS component on a computer that is running Windows Vista Service Pack 2 (SP2) or Windows Server 2008 Service Pack 2 (SP2).
• You enable the Distributed File System (DFS) on the computer. By default, DFS is enabled on the client computer.
• You run an application that uses a Universal Naming Convention (UNC) path to access a network file system (NFS) share.

In this scenario, you receive the following error message:

This problem occurs because the computer identifies the UNC path as a DFS path.

On a computer that is running Windows Server 2008 SP2 or Windows Vista SP2, queries are sent through multiple UNC providers (MUPs) to the NFS server. When a UNC path is used, the NFS server returns the STATUS_NOT_IMPLEMENTED flag that is not included in the DFS error list of the computer. Therefore, the computer recognizes this flag as a success flag even though the UNC path is not a DFS path. This behavior causes the error message that is mentioned in the "Symptoms" section.

Hotfix information

A supported hotfix is 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 the problem described in this article. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if 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. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site: Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

Prerequisites

To apply this hotfix, your must be running Windows Vista Service Pack 2 (SP2) or Windows Server 2008 Service Pack 2 (SP2). Additionally, you must have the Client for NFS component installed.

For more information about how to obtain a Windows Vista service pack, click the following article number to view the article in the Microsoft Knowledge Base: For more information about how to obtain a Windows Server 2008 service pack, click the following article number to view the article in the Microsoft Knowledge Base:

Registry information

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

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

File information

The English (United States) version of this hotfix installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and the times may change when you perform certain operations on the files.

Windows Vista and Windows Server 2008 file information notes

Important Windows Vista hotfixes and Windows Server 2008 hotfixes are included in the same packages. However, only "Windows Vista" is listed on the Hotfix Request page. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows Vista" on the page. Always refer to the "Applies To" section in articles to determine the actual operating system that each hotfix applies to.

• The files that apply to a specific product, SR_Level (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table.
  Collapse this tableExpand this table

  Version	Product	SR_Level	Service branch
  6.0.600 0 . 20xxx	Windows Vista	RTM	LDR
  6.0.600 1 . 22xxx	Windows Vista and Windows Server 2008	SP1	LDR
  6.0.600 2 . 22xxx	Windows Vista and Windows Server 2008	SP2	LDR

• Service Pack 1 is integrated into the release version of Windows Server 2008. Therefore, RTM milestone files apply only to Windows Vista. RTM milestone files have a 6.0.0000.xxxxxx version number.
• The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed separately in the "Additional file information for Windows Server 2008 and for Windows Vista" section. MUM files and MANIFEST files, and the associated security catalog (.cat) files, are extremely important to maintaining the state of the updated component. The security catalog files, for which the attributes are not listed, are signed with a Microsoft digital signature.

For all supported x86-based versions of Windows Vista SP2 and of Windows Server 2008 SP2

For all supported x64-based versions of Windows Vista SP2 and of Windows Server 2008 SP2

For all supported IA-64-based versions of Windows Server 2008 SP2

To work around this problem, use the Samba application instead of Services for NFS on the NFS share server.

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

Samba is an application that allows Windows-based systems to map and to use shared volumes that reside on Linux-based systems by using the Common Internet File System (CIFS) protocol. By using the Samba application, Windows-based clients can map the shared volumes that are located on a Linux server and use them as if they resided on a Windows-based server.

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

Additional file information

Additional file information for Windows Vista and for Windows Server 2008

Additional file for all supported x86-based versions of Windows Vista SP2 and of Windows Server 2008 SP2

Additional file for all supported x64-based versions of Windows Vista SP2 and of Windows Server 2008 SP2

Additional file for all supported IA-64-based version of Windows Server 2008 SP2

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.