Comment 1 for bug 1492301

If you're still interesting in this question, so you can add further code to duplicity/backends/onedrivebackend.py right after self.http_client = OAuth2Session(...) (for 0.7.06 it should starts on line 125) :

        # We have to refresh token manually because it's not working "under the covers"
        if token is not None:
         self.http_client.refresh_token(self.OAUTH_TOKEN_URI)

There are some problems with requests-oauthlib. It doesn't refresh token... it needs more deeper analysis. But we can just refresh it manually at this moment.

duplicity-team, maybe it worth to be commited ?