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Introducing Microsoft RemoteFX USB Redirection

| Monday, June 14, 2010
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In April, Max Herrmann posted a blog article announcing our newest device redirection feature for Remote Desktop Virtualization Host: RemoteFX USB redirection. In this three-part series, we’ll take a closer look at the feature and how it helps close the gap between the user experience of a local user sitting at their physical desktop and that of a remote user connected to a virtual desktop. The first part of the series gives an overview of the feature and what it can do, and how to set up a basic deployment of the feature.

Feature Overview
The goal of RemoteFX USB redirection is simple: the user should be able to use any device they want, and have it just work. RDP has numerous high-level redirections that allow specific types of devices to be used effectively in a remote session, such as:

Easy Print, which allows users to print to local printers in remote sessions
Drive Redirection, which allows users to access the file system on any local drive in a remote session, including USB drives
Smart Card Redirection, which allows users to authenticate to and in a remote session by using smart cards/e-tokens
Plug-and-Play Device Redirection, which allows users to access PTP digital cameras, MTP music players, and POS for .NET devices in a remote session, among others
Input Redirection, which allows the use of keyboards/mice in remote sessions
Audio Redirection, which allows recording and playback of audio in remote sessions
Port Redirection, which allows the use of serial and parallel ports in remote sessions
However, there are many devices which are not covered by these redirections, such as scanners, multifunction printers, webcams, and more. RemoteFX USB redirection acts as a catch-all mechanism that redirects these USB devices! Unlike high-level redirections such as drive redirection, RemoteFX USB redirection happens at the port protocol (USB request block or URB) level, and is similar to how one can redirect serial or parallel ports via RDP. This provides some unique advantages, as you’ll see below. However, RemoteFX USB redirection is meant to supplement high-level redirections, not to supplant them.

Read more: Remote Desktop Services (Terminal Services) Team Blog Part1

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