As of Dynamics CRM 2015, users that belong to certain hierarchies may be able to access their direct reports' records without the need for sharing.
Hierarchy works using either Manager Hierarchy (based on the user's manager hierarchy) or Position Hierarchy. In this recipe we will focus on the latter.
To configure security hierarchies, you will need a System Customizer
or higher security role. More specifically, when changing or assigning positions, you will require the Assign a position to a system user
and Change hierarchy security settings
privileges. Both these privileges are available by navigating to Business Management
| Miscellaneous Privileges
.