Arq only works with consumer OneDrive accounts right now (I work on Arq).
But we're modifying it right now to work with O365 accounts. Email me at support@arqbackup.com and I'll let you know when it's ready.
https://azure.microsoft.com/en-us/pricing/details/storage/bl...
(I had assumed it was already supported based on this chart: https://www.arqbackup.com/docs/pages/strategy.html )