Umango may suddenly experience authorization errors when trying to import or export documents via Office365, OneDrive or SharePoint Connectors when tenant admin consent or oAuth authorization options are in use.
Version 25.9.0.4 included an important update for admin consent and oAuth authentication. Azure app client ID's expire every 2 years and require Umango to include references to the new client ID in a maintenance release. This means old versions (referencing the old client ID) will stop working and new versions (referencing the new ID) require users to re-authorize Umango.
To resolve the issue, update to the latest version of Umango (25.9.0.4 or newer) then follow the authorization flow again. Once authorized, Umango should be able to process documents again without issue.
Link to this article https://umango.com/KB?article=132