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This article describes the behavior that occurs in Windows Vista when you are prompted to enter administrative credentials for a directory to which you do not have permissions. Keep reading →

When you use the Remote Desktop Client to connect to a Microsoft Windows 2000 Terminal Server from Window Vista or from Windows Server 2008, the automatic authentication fails, and you are prompted two times for the credentials.

This does not occur when you connect to a Windows Server 2003 Terminal Server.

On a Windows Vista-based client computer, you access an online document that is on a site that uses Windows Live ID (WLID) authentication. Then, you are prompted for user credentials two times. However, you expect to be prompted for user credentials only one time.

On a Windows Vista-based computer, when you try to connect to a computer that is running Windows XP or Windows Server 2003 through a Remote Desktop Protocol (RDP) connection, the RDP connection fails. Also, you receive the following error message:

The security policy of your computer requires you to type a password on the Windows Security dialog box. However, the remote computer you want to connect to cannot recognize credentials supplied using the Windows Security dialog box. For assistance, contact your system administrator or technical support

This problem occurs when the Require trusted path for credential entry Group Policy setting is enabled on the Windows Vista-based computer.

Consider the following scenario:

• On a Windows Vista-based computer, you establish a dial-up connection to connect to the Internet.
• You establish a virtual private network (VPN) connection through a dial-up connection.

In this scenario, the VPN credentials are not cached the first time that the VPN connection is established.

Consider the following scenario.

• On a Windows Vista-based computer, you do not configure a proxy in Windows Internet Explorer.
• You use Web Distributed Authoring and Versioning (WebDav) to access a fully qualified domain names (FQDN) site.

In this scenario, you are prompted to enter your credentials, even though the user account that you are using has sufficient permission to access this site.

For example, when you open a Microsoft Office file from a Microsoft Office SharePoint site by using 2007 Microsoft Office on a Windows Vista-based client computer that has no proxy configured, you are prompted for authentication.

Note: This problem does not occur on a Windows XP-based computer.

Consider the following scenario:

• You are running a Windows Vista-based computer.
• You try to access a Web Distributed Authoring and Versioning (WebDAV) site that is located on a server that uses passport authentication.

In this scenario, you may be prompted for your passport credentials every time that you try to access documents on the WebDAV site from a new workspace.

This behavior occurs even after you save your passport credentials in Credential Manager.

Consider the following scenario:

• You are running a Windows Vista-based computer.
• You use Windows Internet Explorer to access files on a Web Distributed Authoring and Versioning (WebDAV) site that resides on a local intranet site.
  Note: A Microsoft SharePoint Portal Server site is an example of a WebDAV site.

In this scenario, you receive a dialog box that prompts you to enter your user credentials.

This problem occurs if the following conditions are true:

• You do not configure any proxy-server settings in Internet Explorer.
• You access the WebDAV site on the local intranet site by using a single label host name, such as http://sites/ or http://mysps/.

This problem does not occur on a Windows XP-based computer that has Internet Explorer 6 or Internet Explorer 7 installed.

Consider the following scenario:

• You use a non-administrative user account on a Windows Vista-based computer.
• This user account belongs to a group other than the Users group. Additionally, this group has a linked token.
• You try to open a Systems Management Server (SMS)-based item in Control Panel.

  For example, you try to open the Run Advertised Programs item in Control Panel.

In this scenario, you are prompted to type your administrative credentials. Therefore, you cannot open the item in Control Panel.