1. You take an action that requires access to a cloud data source. For example, you open a workbook that’s published to Tableau Online .
2. Tableau directs you to the cloud data provider’s sign-in page. The information that is sent to the data provider identifies Tableau as the requesting site.
3. When you sign in to the data, the provider prompts you to confirm your authorization for Tableau Online to access the data.
4. Upon your confirmation, the data provider sends an access token back to Tableau Online .
5. Tableau Online presents your workbook and data to you.