I know there are McAfee Maintained Lists for a lot of Microsoft's cloud offerings but I haven't seen one specifically for OneDrive. What you could possibly do is run a Rule Trace while a test machine of yours is trying to access OneDrive and after observing the results, maybe you can block the pages you see that need to be loaded for a successful connection. Maybe you could find some necessary resource that must be loaded and then look for that criteria and then have MWG send a block page whenever it sees said criteria.
Onedrive is included in the Applications List under "File Sharing".
Microsoft Office 365 Onedrive For Business in under "Hosting Services"
Thanks for this. It seems OneDrive is also in the Applications List in 18.104.22.168.0