Tree AD trust with AAD Connect

Hi rosaliod 

It's the first time i heard this type of trust but i confirm, this trust exists

Active Directory Trust Types

Parent-child Trust: Parent-child Trust is an implicitly established, two-way, transitive trust when you add a new child domain to a tree.

Tree-root Trust: Tree-root Trust is an implicitly established, two-way, transitive trust when you add a new tree root domain to a forest.

Shortcut Trust: Shortcut Trust is an explicitly created, transitive trust between two domains in a forest to improve user logon times. Shortcut Trust will make a trust path shorter between two domains in the same forest. The Shortcut Trust can be one-way or two-way.

External Trust: External Trust is explicitly created, non-transitive trust between Windows Server 2003 domains that are in different forests or between a Windows Server 2003 domain and Windows NT 4 domain. The External Trust can be one-way or two-way.

Realm Trust: Realm Trust is explicitly created transitive or non-transitive trust between a non Windows Kerberos realm and a Windows Server 2003 domain. This trust helps to create trust relationship between Windows Server 2003 domain and any Kerberos version 5 realm. The Realm Trust can be and one-way or two-way.

Forest Trust: Forest Trust is explicitly transitive (between two forests) created trust between two forest root domains. The Forest Trust can be one-way or two-way.