A Microsoft file hosting and synchronization service.
Thanks, this is working so that I have the shared folder set up as a network drive on my PC. I can now upload and download files and folders directly to that. Although it doesn't fix the sharing problem it is a good workaround for now.
Side note, I can still access other shared folders from other accounts on the web and ondrive app but not this one. I can still access the shared folder when clicking the link in the email but the folder will not show up in the onedrive under "shared" and won't let me create a shortcut to the shred folder.