A family of Microsoft word processing software products for creating web, email, and print documents.
At the moment I'm working on a computer with Windows 7 and no sync client installed, so I can't test the available options myself, but you should see (at the very least) something called Settings or perhaps Options when right-clicking the OneDrive icon on the taskbar.
These read-only issues seem to resurface from time to time, and I don't think there has ever been an explanation that applies to everyone.