Thoroughly disabling OneDrive in Windows 10

The Windows 10 OneDrive app really likes to pop up my OneDrive folder every so often. Since I don't use OneDrive on most of my devices, I like to turn it off to minimize annoyance. There isn't a very convenient way to do it, but it can be disabled with Group Policy. The relevant setting is this one (Policy Plus unique ID):

Microsoft.Policies.OneDrive:PreventOnedriveFileSync

In the normal hierarchy, that's Computer Configuration → Administrative Templates → Windows Components → OneDrive → "Prevent the usage of OneDrive for file storage."

Enable that, and OneDrive will stop bothering all users on the computer.