The tsm reset command is specifically designed to remove all configurations, content, and user data from a Tableau Server installation, effectively returning it to a pre-initialized state. After this command is executed, the server must be re-initialized. This re-initialization process requires the administrator to configure the server from scratch, which includes the mandatory step of creating a new initial administrator account. This directly addresses the requirement to set up a new administrator account upon the next login/setup attempt.

A. Edit tabsvc.yml: Manually editing the tabsvc.yml file is not the standard procedure for resetting an administrator account and is strongly discouraged unless directed by Tableau Support, as it can cause instability.

C. Run the tsm register command: The tsm register command is used exclusively for managing product keys and the registration of the Tableau Server software. It has no function related to user account management.

D. Reinstall Tableau Server: While a full reinstallation would achieve the goal, it is an unnecessarily drastic and time-consuming solution. The tsm reset command provides a more direct and efficient method to achieve the same outcome.

1. Tableau Server Help - tsm reset: "Use the tsm reset command to remove all configuration and return Tableau Server to the state it was in just after it was installed. ... After you run the tsm reset command, you must run the tsm initialize command..." The initialization process includes creating the initial administrator user.

Source: Tableau Official Documentation, tsm reset, https://help.tableau.com/current/server/en-us/clireset.htm

2. Tableau Server Help - Step 1: Install and Initialize TSM: This document outlines the initial setup process which is triggered after a fresh install or a tsm reset. Step 1.5 describes creating the initial administrator account.

Source: Tableau Official Documentation, Install and Configure Tableau Server, https://help.tableau.com/current/server/en-us/installinstall.htm (See section on initializing TSM).

3. Tableau Server Help - tsm licenses: This documentation details the commands for licensing, including register, confirming its purpose is unrelated to user accounts.

Source: Tableau Official Documentation, tsm licenses, https://help.tableau.com/current/server/en-us/clilicensestsm.htm

4. Tableau Server Help - tabsvc.yml Configuration File: This document explicitly warns against modifying the tabsvc.yml file without guidance from support.

Source: Tableau Official Documentation, Configuration File, https://help.tableau.com/current/server/en-us/configfile.htm