we have installed ArcGIS Server 10.4 on a Windows 2012 R2 Server (virtual machine) with Apache Tomcat 7.0.65. We want to use LDAP for the user authentification. All Users (LDAP) are displayed in ArcGIS Manager but unfortunately no authentification window opens when we want to access protected services from ArcGIS Server. When we try to access to a protected service in a browser window, no authentification window opens and no service will be displayed. We think, that the user credentials are not checked and the access is "anonymous".
The windows authentification with windows active directory works fine.
Can Anyone help us?