Hey folks!

I'm currently trying to add, besides our ext.net "form" authentication, a simple Single Sign-On via Azure Active Directory following this document: https://docs.microsoft.com/en-us/azu...-aspnet-webapp

I've already added the appropriate login/logout controller methods and the startup-config, but I'm still not getting redirected to the SSO login page. Maybe I'm missing anything regarding the coexistence of forms authentication or what am I doing wrong?

My login.aspx page has the following SSO button implemented:
<ext:FormPanel runat="server" FormID="Form_SSO" Border="false" Layout="HBoxLayout" PaddingSpec="10" MarginSpec="0 0 8 0">
    <Items>
        <ext:Button ID="ButtonSingleSignOn" runat="server" Text="Login" Icon="Key" Height="25" Flex="1" AutoPostBack="true">
            <DirectEvents>
                <Click Url="/User/Login" Timeout="60000" Method="POST" Before="Ext.Msg.wait('Redirecting ...', 'SSO Authentication');">
                    <ExtraParams>
                        <ext:Parameter Name="ReturnUrl" Value="GetReturnUrl()" Mode="Raw" />
                    </ExtraParams>
                </Click>
            </DirectEvents>
        </ext:Button>
    </Items>
</ext:FormPanel>
----- textbox/password and login button providing forms authentication -----

The appropriate UserController method:
[AcceptVerbs(HttpVerbs.Post)]
public void Login(string returnUrl)
{
    if (!Request.IsAuthenticated)
    {
        HttpContext.GetOwinContext().Authentication.Challenge(
            new AuthenticationProperties { RedirectUri = returnUrl },
            OpenIdConnectAuthenticationDefaults.AuthenticationType);
    }
}
Any help would be highly appreciated, thanks!