Explanation:

In Microsoft Entra ID, Administrative Units (AUs) are logical groupings that allow delegation of administrative permissions over specific subsets of users or groups. This delegation follows scope-based role assignment principles. The Password Administrator role enables resetting user passwords, but only within the assigned scope (either at the AU level or globally).
Let's analyze the scenario step by step:
* Administrative Units and Membership Rules
* AU1 includes users where (user.de partment -eq " Department1 " ) # so User1 and User2 belong to AU1.
* AU2 includes users where (user.department -eq " Department2 " ) # so User3 belongs to AU2.
* Role Assignments
* Admin1: Password Administrator for AU1 # can manage password operations for User1 and User2.
* Admin2: Password Administrator for AU2 # can manage password operations for User3.
* Admin3: Password Administrator at Global scope # can reset passwords for all users in the tenant.
* Access Evaluation
* Admin1 # User1: Yes, because User1 is in AU1.
* Admin2 # User2: No, because Admin2's scope (AU2) doesn't include User2, who is in AU1.
* Admin3 # User3: Yes, because Admin3 has global scope and can manage all users.
However, note that Admin2 can only reset User3's password because User3 belongs to AU2.
Thus, applying SC-300 documentation logic:
"Administrators can perform their role's permitted actions only on objects within their administrative unit scope, unless their role assignment is global."