How to set the default start page for all users
By default, Tableau Server installs with the Views page as the default start page for all users. As the administrator, you can change this to another page that all users have access to, such as the Workbooks page. Individual users will be able to override your setting
To set the default start page for all users
Navigate to the page you want to be the default page.
Click your name on the upper right corner of the page.
Select Make This the Start Page for All Users.