Every user has a home organization. To view or change a user's details, you need to have the appropriate permissions to the user's home organization.
Every organization except the top level organization is a subsidiary of another organization. This means that organizations form a hierarchy with just one organization—the root organization—at the top.
If an organization is a subsidiary of another organization, this has the following effect:
SDL Studio GroupShare displays the organizations in a hierarchy.
The roles assigned in an organization propagate to subsidiary organizations. In other words, the effective set of roles assigned in an organization is the sum of the roles assigned in that organization and higher ones.