save file to Office 365 OneDruve

You could upload the file using the instructions in the docs, https://laravel.com/docs/6.x/filesystem#file-uploads

Then doesn't Azure have futher instructions on moving or copying files to One Drive.

There's also a rest API https://docs.microsoft.com/en-us/onedrive/developer/rest-api/concepts/upload?view=odsp-graph-online

It would seem there is a package

https://github.com/matthewbdaly/laravel-azure-storage