I have to authenticate user/group using active directory without asking for login when accessing the application in MVC, Any help/resources appreciated . Thank you.
Enable Windows Authentication in IIS.
https://docs.microsoft.com/en-us/aspnet/mvc/overview/older-versions-1/security/authenticating-users-with-windows-authentication-cs
Set your Authentication mode as windows
<authentication mode="Windows"> </authentication>
Below code will give you details of current logged in user
WindowsIdentity clientId = (WindowsIdentity)HttpContext.Current.User.Identity;