SAML (Security Assertion Markup Language) is an XML standard that allows secure web domains to exchange user authentication and authorization data. You can configure Tableau Online to use an external identity provider (IdP) to authenticate users over SAML 2.0. No user credentials are stored with Tableau Online, and using SAML enables you to add Tableau to your organization’s single sign-on environment.
If you want to use site-specific SAML, you must configure server-wide SAML before you configure individual sites. Server-side SAML does not need to be enabled for site-specific SAML to function, but it must be configured.
User authentication through SAML does not apply to permissions and authorization for Tableau Online content, such as data sources and workbooks. It also does not control access to underlying data that workbooks and data sources connect to.
Note: Tableau Online supports both service provider initiated and IdP initiated SAML in browsers only. Connections from Tableau Desktop or the Tableau Mobile app require that the SAML request be service provider initiated.
The following image shows the steps to authenticate a user with single sign-on in a typical service provider initiated flow:
User navigates to the Tableau Online sign-in page or clicks a published workbook URL.
Tableau Online starts the authentication process by redirecting the client to the configured IdP.
The IdP requests the user’s username and password from the user. After the user submits valid credentials, the IdP authenticates the user.
The IdP returns the successful authentication in the form of a SAML Response to the client. The client passes the SAML Response to Tableau Online.
Tableau Online verifies that the username in the SAML Response matches a licensed user stored in the Tableau Server Repository. If a match is verified, then Tableau Online responds to the client with the requested content.