Hi!
OS: Ubuntu 16.04, SSSD: 1.13.4
I'm seeing something that has me wondering if I have missunderstood anything. (quite possible)
I have multi domain Active Directory forest. I have a client connected to subdomain1 using SSSD and can do ID-query in both subdomain1 and subdomain2.
If I have a user with a username that only exists in one of these domains then there is no problem.