There is a known Admin, and I contacted them (but still waiting on an answer). I figure since she was able to backup to OneDrive v2 before, she should still have the necessary permissions to backup to OneDrive v2.
The error message pops up on the Destination screen, after clicking on AuthID and entering the user’s credentials.
I don’t understand. You said “Trying to configure”. Was backup configured previously, or what?
Multiple backup jobs can use the same AuthID as far as I know. Just copy it, and paste to new.
Duplicati OAuth Handler has “Click here if you need to revoke a previously established authid”.
Typically there’s also a way to invalidate from the cloud service end. Continuing to create new
AuthIDs may eventually force some old ones to become invalid, as services may have limits…
Our head office clamped down on O365 app permissions, which caused Duplicati backups to fail for all new users. (It continued to work for users who configured Duplicati before the clamp-down.) They are now working on giving Duplicati permissions again.