As a site administrator, you can customize the logo in Tableau Online. Please see the following article for instructions: Tableau Online: Change your Site Logo
Senior Technical Lead
Thanks for your answer but it's not exactly my question.
I knew this method but it only change the logo on Tableau Online, not on the login page and I precisely would like to customize the login page.
I saw Something with an API REST, does anyone try this method?
It's not possible to modify the login page for Tableau Online as this is a server-side setting. Tableau Online is a shared environment with multiple customer sites. The functionality you are looking for would be available in Tableau Server only.
Ok that's what I feared...thank you.