'We can't access your OneDrive folder' should have a dimiss/exit button
If the onedrive storage location is temporarily unavailable (i.e. in an unmounted encrypted partition) the dialog box that pops up is always on top and has no way to dismiss it.
It gives two options 'Try again' and 'Set up OneDrive'.
Because the directory it is looking for is in a bitlocked partition which I don't always need to unlock, I have to deal with this annoying message every time I start my computer and can't simply dismiss the dialog without unlocking the partition. Dropbox offers an 'exit' option for the same case.