Regarding trusted authentication, that feature is not available at this time.
Thanks but without trusted authentication what features does the canvas app offer beyond an iframe? Am I missing something?
Do I need to setup an instance of tableau server instead of tableau online to use trusted authentication? Would that work with Sparkler?
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In response to your second question, yes both trusted authentication and SAML have been validated to work with Sparkler using Tableau Server. Some of our demos are running Tableau Server on AWS.
Regarding your first question, there are many ways to go about answering it depending on your requirements and situation. If you want to simply and quickly embed a dashboard, then the iframe may be the way to go for Tableau Online. Canvas is Salesforce's framework for integrating web applications to their platform. So besides embedding dashboards, we are looking at ways we can leverage this framework and make the interaction more seamless and integrated. Canvas provides additional ways to tie back to other Salesforce services whereas an iframe cannot. There are also more possibilities available when trying to extend a canvas application to Salesforce1 which is their mobile platform.
Another key reason is also security. If you have a requirement to ensure https to Tableau, canvas enforces it. Also, if you have many dashboards throughout your salesforce org, it's easier to manage permissions to Tableau dashboards from a canvas application instead of having to go through all iframe embeddings and manage permissions as well.
Thanks for taking the time to respond.
Anytime. Let me know if there is anything I can assist with.