concept permission in category active directory
appears as: permissions, permission, permissions, permission

This is an excerpt from Manning's book Learn Active Directory Management in a Month of Lunches.
The forest is the security boundary for Active Directory, which means you can’t set permissions outside the forest, and objects outside the forest aren’t granted permissions inside the forest. There are exceptions to those statements where you create trusts to other forests, but we’ll get to that later.
Viewing permissions