Hi,
What type of Trust you have created and if it is a 2 way or one way Trust? Is it transitive trust?
In this scenario you will require Transitive trust and please review the article - concepts-forest-trust
Also review this article from our MVP and very good information here for the AD trusts - active-directory-trusts
=
Please "Accept the answer" if the information helped you. This will help us and others in the community as well.