Looking for logging into the Webapp With External Windows User site and are not getting the correct working link for it? In such a case, you can use the links given here by searching your desired login page in the search box. If the page is present on our website then you will get all the links related to the Webapp With External Windows User site. After that you can login as usual with your login credentials.
https://docs.microsoft.com/en-us/aspnet/core/security/authentication/social/microsoft-logins
https://docs.microsoft.com/en-us/azure/active-directory/develop/quickstart-v1-aspnet-webapp
https://docs.microsoft.com/en-us/aspnet/mvc/overview/security/create-an-aspnet-mvc-5-web-app-with-email-confirmation-and-password-reset
https://docs.microsoft.com/en-us/office/dev/add-ins/develop/auth-external-add-ins
https://stackoverflow.com/questions/25772028/connecting-asp-net-mvc-web-app-to-use-windows-credentials-for-user-login
https://auth0.com/docs/connections/enterprise/azure-active-directory/v2
https://howtofirebase.com/firebase-authentication-for-web-d58aad62cf6d
https://csuf.screenstepslive.com/s/12867/m/48670/l/529153-attending-a-skype-for-business-meeting-for-users-without-a-skype-for-business-account
http://enterprise.arcgis.com/en/portal/latest/administer/windows/use-integrated-windows-authentication-with-your-portal.htm
https://tomcat.apache.org/tomcat-7.0-doc/windows-auth-howto.html
https://docs.aws.amazon.com/IAM/latest/UserGuide/id_roles_common-scenarios_federated-users.html
https://martinfowler.com/articles/web-security-basics.html
https://en.wikipedia.org/wiki/Web_Application_Proxy