License to Microsoft. Notwithstanding the limitations in Section 1, you may distribute your modifications back to Microsoft, and if you do provide Microsoft with modifications of the Materials, you hereby grant Microsoft, without any restrictions or limitations, a non-exclusive, perpetual, irrevocable, royalty-free, assignable and sub-licensable license, to reproduce, publicly perform or display, install, use, modify, post, distribute, make and have made, sell and transfer such modifications and derivatives for any purpose.
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Sources: Microsoft Research License, Microsoft Research License Terms, Microsoft Research License Terms