How to change a user’s site role
By default both server and site administrators can manage user settings. On Tableau Server, server administrators can configure a site to disallow site administrators the ability to manage users.
Sign in to the site, and go to the Users area.
Select the users, and then select Actions > Site Role.
You can hover the pointer over the information icon to display a matrix that shows the maximum level of general capabilities each site role allows.
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