Users who are set up for an external file source but aren’t logged in are prompted to get authenticated. The Connect Now link initiates the one-click login process, and authentication is quickly taken care of. The banner prompt is available for external data sources: SharePoint Online, OneDrive for Business, Google Drive, Box, and Quip.
When an unauthenticated user pastes a Google Drive link in Chatter, they see a prompt to get connected. The link initiates the same one-click authentication that lets users get back to work with minimal interruption.
These notifications affect users with the Per User authentication setting on their external data source.