Why is the user getting 401 (Windows authentication)?

Question

ASP.NET

Made a small web application for work. Hosted on my local IIS server.
The web.config says:

<authentication mode="Windows" />
    <authorization>
      <deny users="?" />
    </authorization>

The idea is that any user who has passed domain authentication can use.
However, except for me, no one can get in, a 401 error is returned.
What needs to be screwed up?