Understanding who can access a record is critical to securing record access in your organization. Check out a record’s sharing hierarchy to view who it’s shared with. You can also see the user’s reason for access and find out if a user’s access is blocked by a restriction rule.
Where: This change applies to Lightning Experience in Professional, Enterprise, Performance, Unlimited, and Developer editions.
How: To see a list of users who have access, click Sharing Hierarchy from the Action Menu on the desired record. To see why the user has access to the record or why access is blocked, click View next to the user’s name.
When you click View, all applicable sharing reasons appear, including the names of owner-based and criteria-based sharing rules.