FIX: Error message when you try to install a ClickOnce application that you created in the .NET Framework 2.0 onto a client computer that is configured to use a proxy server: "Proxy authentication required"
You create a ClickOnce application in the Microsoft .NET Framework 2.0.
You publish the ClickOnce application to a deployment server.
A client computer is configured to use a proxy server that requires authentication.
In this scenario, when you try to install the ClickOnce application from the deployment server onto the client computer, you receive the following error message:
The remote server returned an error: (407)Proxy Authentication Required.
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 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 software update that contains this hotfix.
To download this hotfix from the MSDN Code Gallery, visit the following Microsoft Web site:
Note The MSDN Code Gallery displays the languages for which the hotfix is available. If you do not see your language listed, it is because the Code Gallery resource page is not available for that language.
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:
You must have the .NET Framework 2.0 installed to apply this hotfix.
If you apply this hotfix within 15 minutes after you perform a ClickOnce operation, you must use one of the following methods for the hotfix to take effect:
Restart the client computer.
On the client computer, close all ClickOnce applications, and then wait until the Dfsvc.exe process exits.
Note The Dfsvc.exe process shuts down automatically after 15 minutes.
Hotfix replacement information
This hotfix does not replace any other hotfixes.
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.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about software update terminology, 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