I am forking a source code repository. The repository contains a file, LICENSE.TXT, which reads:
Copyright (c) 2021 Microsoft
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
What is the common practice here? It seems I must keep a copy of this license in my repository and also publish it when deploying my software. I also want to provide my own license (also under MIT), but I can't sign it using 'Microsoft'. Should I perhaps rename Microsoft's LICENSE.TXT to something else, then create my own LICENSE.TXT and put my name in it?
Basically, I want to abide by the existing license and to publish my own license (which incidentally will be identical but not signed by 'Microsoft' as I am not employed by that company).