An app to use Microsoft 365 on mobile devices

I am thinking of making an app to access and operate [COLOR="#000000"]Microsoft 365 business services on mobile Android devices.
I’ve found that Microsoft 365 is a very useful application for the day-to-day use of Businessmen.
I think this idea has potential and it needs to be tapped into.
I need some help regarding the copyright.
If I make such an app, would the copyright of the app given to me or Microsoft have control over it?[/COLOR]