There are 4 ways to control whether a user profile is required for authentication to be successful in OpenAM.
The default is Required and the next popular is Dynamic. I have never tried Ignored before.
So I went ahead to test what to expect if Ignored is chosen.
1. I created a AD authentication module
2. I purposely ignored creating a corresponding AD data store
3. I even went to the extend of deleting the default OpenDJ data store
The following is the screen when my AD user successfully authenticated - "You've logged in".
The end user console is skipped from displaying.
A session is still created when you navigate to the Session tab in OpenAM Admin Console.