Microsoft's open source license for Non-Commercial Academic Use Only: "You may create derivative works of the Software source code and distribute the modified Software solely for non-commercial academic purposes, as provided herein.. If you distribute the Software or any derivative works of the Software, you will distribute them under the same terms and conditions as in this license, and you will not grant other rights to the Software or derivative works that are different from those provided by this MSR-LA. Your license rights to the Software (or any Microsoft intellectual property associated therewith) does not include any license, right, power or authority to subject the Software or derivative works thereof in whole or in part to the terms of any license that requires as a condition of use, modification and/or distribution of software subject to such license that the software or other software combined and/or distributed with such software be (A) disclosed or distributed in source code form; (B) licensed for the purpose of making derivative works; or (C) redistributable at no charge."
Bla bla bla. :-) You're allowed to modify it but you're not allowed to licensie it under another license that would allow the distribution in source code form or distribution at no charge.