I have gone through the detailed architecture of Windows Interactive logon procedure both for local and domain login.
But one thing I am not sure how actually it works when:
My system is part of a Domain group and both local administrator and Domain Administrator have the same credential/password.
e.g: MyDomain\Administrator this is Domain Administrator have the same password for local administrator.
In this case how authentication actually works? Whether it validates the user from the local LSA or it goes till Domain controller LSA?