User Groups administration

Within administration / user management is it possible to add a group of users to another group of users – i.e. have a hierarchy of groups.

With SSO our users automatically belong to various groups, and rather than having to maintain a list of users within indico, is it possible for a group to have an entry such as ‘all users who belong to this (or that) group)’.?

No, that’s not supported for local groups.

But if you use LDAP groups then it depends on whether your LDAP server supports it.