A Microsoft file hosting and synchronization service.
Hi Bill, Welcome in Community
Ok, click the cloud icon in the menu bar and select Quit OneDrive, now open your Applications folder, drag the OneDrive app to the Trash, and empty it.
Go to the official Microsoft OneDrive download page and download the latest installer for macOS, run the installer. Once re-opened, sign in with your account.
Since your sync folder already exists, OneDrive will index your files rather than downloading everything from scratch.
Let me know how it goes
Elvis