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.
Any plans for Azure Storage support? They seem to have much cheaper archival storage than the competition, offering $0.002/GB, amounting to $2 per TB, which is half the price of Glacier.
We're looking at it. Looks like it takes up to 15 hours to get your data "rehydrated" so you can download it. Also it's $5 to rehydrate 10,000 blobs so depending on how Arq chunked your data it could cost quite a bit of money to restore.