No, it is free! (I never thought I would live to see something like this). At the beginning of each document you have something like this:

Intellectual Property Rights Notice for Protocol Documentation

Reservation of Rights. All other rights are reserved, and this notice does not grant any rights other than specifically described above, whether by implication, estoppel, or otherwise.

Tools. This protocol documentation is intended for use in conjunction with publicly available standard specifications and network programming art, and assumes that the reader either is familiar with the aforementioned material or has immediate access to it. A protocol specification does not require the use of Microsoft programming tools or programming environments in order for you to develop an implementation. If you have access to Microsoft programming tools and environments you are free to take advantage of them.

More details are given here:

http://www.microsoft.com/interop/osp/default.mspx

Microsoft Open Specification Promise

Published: September 12, 2006 | Updated: October 13, 2008

Microsoft irrevocably promises not to assert any Microsoft Necessary Claims against you for making, using, selling, offering for sale, importing or distributing any implementation to the extent it conforms to a Covered Specification ("Covered Implementation"), subject to the following. This is a personal promise directly from Microsoft to you, and you acknowledge as a condition of benefiting from it that no Microsoft rights are received from suppliers, distributors, or otherwise in connection with this promise. If you file, maintain or voluntarily participate in a patent infringement lawsuit against a Microsoft implementation of such Covered Specification, then this personal promise does not apply with respect to any Covered Implementation of the same Covered Specification made or used by you. To clarify, "Microsoft Necessary Claims" are those claims of Microsoft-owned or Microsoft-controlled patents that are necessary to implement only the required portions of the Covered Specification that are described in detail and not merely referenced in such Specification. "Covered Specifications" are listed below.

This promise is not an assurance either (i) that any of Microsoft's issued patent claims covers a Covered Implementation or are enforceable or (ii) that a Covered Implementation would not infringe patents or other intellectual property rights of any third party. No other rights except those expressly stated in this promise shall be deemed granted, waived or received by implication, exhaustion, estoppel, or otherwise.


In other words, we are totally free to use it, copy it, use it.

On Wed, Jan 28, 2009 at 7:56 AM, Johannes Schindelin <Johannes.Schindelin@gmx.de> wrote:
Hi,

On Wed, 28 Jan 2009, Marc-André Moreau wrote:

> You can download an archive of all the windows network protocol
> documentation as pdfs here:
> http://download.microsoft.com/download/9/5/E/95EF66AF-9026-4BB0-A41D-A4F81802D92C/Windows_Communication_Protocols.zip
>
> http://msdn.microsoft.com/en-ca/library/cc240445(PROT.10).aspx<http://msdn.microsoft.com/en-ca/library/cc240445%28PROT.10%29.aspx>
>
> I don't know if anybody else has noticed, but these new updates also include
> RemoteApp: http://msdn.microsoft.com/en-ca/library/cc242568(PROT.10).aspx<http://msdn.microsoft.com/en-ca/library/cc242568%28PROT.10%29.aspx>
>
> I've just downloaded the whole thing, it seems very complete!

What's the license?  Unless they allow use in Open Source programs
explicitely, without fee, I fail to be impressed.

Ciao,
Dscho