I am a duplicity user and today I found out that I just cant backup to Onedrive. After a little struggle, I eventually came across the following bug post
https://bugs.launchpad.net/duplicity/+bug/1811114 where it is stated that due to changes made by microsoft duplicity can no longer connect, and that this would be handled in a 0.7.19 duplicity version, currently under development. Since the post is not from duplicity webpage, I would like to confirm that this is indeed the case or if there is some work around that I am not aware of. I wrote a post about this issues in the Gentoo forums, which you may check
here. Thank you all for your attention.
Vinícius.