Using users from a Domain Trust

Hello everyone, first of all thanks for this awesome Project, we love it. I am working as an administrator for a local University of Applied Sience. Our Labor has its own Active Directory Server, i am now trying to configure our Gitlab Server for LDAP authentification. Users created on our Domain can access the gitlab, no problem so far. What i am trying now, is that users from our trusted Domain can also access it. Our AD has an external trust to the AD of the hole university. So our members can use their university account to login and use services we provide. Those Computers and Services are bound to our AD…
Has anyone experience with using gitlab bound to an LDAP/AD that has an external trust to another domain ?