Tableau Server requires at least one product key that both activates the server and specifies the number of license levels you can assign to
TSM (Tableau Services Manager) must be installed on the server hosting Tableau Web Server.
Authorized User. The account that you use to sign in to TSM must have authorization to make changes on the local computer where Tableau Server is installed.
By default, the account that you use to sign in to TSM must be a member of the Administrators group on the Windows computer where Tableau Server is installed.
Alternatively, you can specify a Windows group for TSM administration.
for more see Tableau’s Sign in to Tableau Services Manager Web UI.
URL to TSM. https://<URL-for-Tableau-Web-Server>:8850 Where: <URL-for-Tableau-Web-Server> is your URL to the Tableau Web Server.
For example the URL to DataSelf’s bi1 server is https://bi1.dataself.com.The URL to TSM therefor is https://bi1.dataself.com:8850
Enter the URL to TSM in a web browser.
Click Configuration > Licensing
Click Activate License.
On the Activate page, enter or paste your product key and click Activate Product Key.
After your product key is activated, it appears under Activated Product Keys
Sign in to Tableau Services Manager Web UI.