I think only admins and moderators are able to create invites that specify groups that invitees are added to and the topic that invitees see when they first log in. Invites by regular members don’t add groups and don’t take the invitee to a specific topic.
Can you tell us some more about what you are trying to do?
- what additional groups do all new members need to be added to, and why?
- what is the nature of the topic you want to send new members to upon first log in? Is it not enough to pin a topic globally to make sure everyone sees it?
It would be interesting to have a setting to specify what new members see when they first log in. Right now they are just taken to “TOP”, the list of most popular topics.