The green check marks appear because OneDrive keeps running in the background and syncing your data to the cloud. OneDrive has the option to pause sync but the maximum time limit for this is 24 hours.

The green check marks let you know which files are synced. But Windows has a limited number of icon overlays for installed programs. Here's how to make sure they appear in OneDrive.

As you can see in the image below, it displays a green check mark next to the number of a real incoming call, as well as the text "Valid number" just below it. Of course, there's no reason these ...