Hi @kobosh ,
Are you using Internet Explorer? It may be that browser is configured to auto logon as anonymous. The browser has to be set to authenticate as the logged on user. you can change it by in the browser.
settings | Internet options | Security | Local intranet | Custom level | user authentication | Prompt for user name and password
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thanks SamWu. I created empty webform project. added webform file. in web.config added :
<authentication mode="Windows"/>
<autherization>
<deny users="?" />
</autherization>
I run app. I expect to see windows login pop up. Instead web page is open without need to do log in. In the tutorial the video shows windows log in pop up and the page shows only after successful log in. I created a standard user in windows with user name and password. restarted pc and logged in with standard user credentials and opened app. The standard non-admin user I created still was not prompted to log in.