A Microsoft file hosting and synchronization service.
Got answer from Microsoft, the empty "View sync problems" is a known issue on the Mac but the following advice allowed me to find the problem and correct it.
Solution:
- Go to System Preferences > Extensions.
- Then click on "Finder" on the left half of the window
You should see a "One Drive Finder Integration" option. Make sure it's checked. 3. If is checked already, uncheck and recheck again. 4. You should now see green check marks next to files that have been synced with One Drive.