As an administrator (and maybe as a teacher in a course) I would like be able to look up the registered mail-adresses of a group (eg. a course) without having to look in every single user's information.

I need a list of the users containing essential information (first and family name, telephone and mailaddress and so on).

The solution should include a list like the one you get in 'Administration' > 'User and access rights' > 'Print in list format' - but with sorting possibilities.