Issue MSAD - Parent and Child Domain

Hello,

We area implementing SAP IDM 8.0 SP01 and we have been facing the follow issue:

2 Active Directory repositories: A and B (B is child domain from A) like a.com.br and b.a.com.br

We want to grant group privilegies(active directory universal group) from a B group for a user from domain A. Is this possible?

When we execute it, IDM tries create the same user A in the domain B.

How can we resolve this issue? Our implementation is correct from this AD cases?

Thanks