JSI Tip 9838. How do I perform a server-to-server FTP transfer by using IIS?

Microsoft Knowledge Base Article 247132 contains the following summary:

This step-by-step article describes how to configure a computer that is running Microsoft Internet Information Services (IIS) to allow server-to-server FTP transfers by modifying values in the system registry.

Note By default, these values are disabled to prevent malicious attacks against the file transfer protocol (FTP) service. Although details for configuring server-to-server transfers are listed in this article, Microsoft does not recommend modifying these registry keys on IIS-based FTP servers that are connected to the Internet.