Since InLoox 9 the contact management tool offers the possibility to directly invite new users to InLoox now!. Therefore, proceed as follows: (Start from your inbox)
1. Open the InLoox now tab and click on People. The InLoox address list opens and gives an overview over all contacts.
2. Click on Invite Contacts on the Start tab.
3. A new window for selecting the contacts will open.
4. The selected contact will receive an invitation mail for InLoox now!.