The components of Tableau Server are started and stopped by a central service. In the Windows Services Console, this service appears as Tableau Server (tabsvc). By default, the Tableau Server installation selects a built-in Windows system account to start and stop this service. This account is NT AUTHORITY\NetworkService. Do not start, stop, or edit the properties of this service directly.
To meet Local IT policy requirements or to use NT authentication between Tableau Server and Microsoft data sources, you can specify an account called Run As User. Refer to the Run as User topic in the Server Online Help to prepare Tableau Server to run with a Run As User account.