You can remove a local ESXi user from the host.

Caution: Do not remove the root user.
If you remove a user from the host, they lose permissions to all objects on the host and cannot log in again.
Note: Users who are logged in and are removed from the domain keep their host permissions until you restart the host.

Procedure

  1. Click Manage in the VMware Host Client inventory and click Security & Users.
  2. Click Users.
  3. Select the user that you want to remove from the list, click Remove user, and click Yes.
    Do not remove the root user for any reason.