As I continue to kick the tires (without documentation it is a bit of trial and error). I found that Admins can manage Spaces. So if I want someone to add members and remove members then I need to make them an admin to a space. Still poking around to determine what the moderator can do. I expect remove bad posts and other tasks. Now, when I attempted to add a new user (I was logged in as Admin), I was then able to send and email and invite someone. One problem...I am using Memberpress to manage users and for coursework (maybe I will move to Fluent communities for the learning system....once it reaches the level of capability of Memberpress). One the invitee gets the invite via email...they cannot register as it brings the person to the Fluent Communities member add...but i need to redirect it to the Memberpress member add. Any ideas are appreciated.