Note: User groups and all their related features are not available in BIM Server.
There is no “tree view” option on the Users page, just a list. This is because one user can be a member of multiple groups; this type of hierarchy cannot be represented by a simple tree. A user can be part of any number of groups.
A group can contain other groups. (In such a hierarchy, the containing group is called a parent group.) In the user list, a selected user or group name is followed by the name of any parent group(s) in the line below.
Note: Circular membership references are not allowed. E.g. if Group A is a member of Group B, then Group B cannot be a member of Group A.