[SSSD-users] Cross domain trust and SSO/NFS ?

We are migrating to a new domain AD domain and I got cross domain trust problems(there is a bidirectional cross trust between the two ADs, how can I test this works from Linux?). All users in domain A has been copied to domain B(using the same UID/GID as in domain A). I have managed to configure sssd for both domains(lets call the old domain A and the new B), joined to both domains and I can login using any of the 2 domains. But here is the problem: If I use the new domain(B) as default login domain, I cannot ssh to another system still in domain A password less(without entering my password again) or access files on NFS mounted files exported from domain A. I know very little about cross trust etc. so I want to ask: 1) Is this even possible? 2) I have no idea where to start looking for what went wrong, need som pointers. We are using sssd 1.13.4 on the new domain B machines while servers in domain A uses an older sssd(1.12.5)  Jocke