TFS42004: Team Build failed to open folder 'path.' The network name cannot be found.

Note: The information in this article applies to Team Foundation Server 2010.

Full error:

TFS42004: Team Build failed to open folder 'path.' The network name cannot be found.

Clicking on the "Open Drop folder" from the Build Definition will cause this error because the UNC path (\\SERVER\FOLDER) will not work over an Internet connection and is intended for use in a local area network. As a workaround, you can access the information using FTP. For client configuration instructions, please access the following section of the DiscountASP.NET TFS Knowledge:

https://support.discountasp.net/KB/c372/ftp-client-configuration.aspx