(The point about inviting users, and providing a configured URL to draw users to that is separate... I'll make another issue about it so you can ignore it here; feel free to edit it out of the post above.)

From Slack:

You need to click on the double user icon on the top right of the header. I can see why that's not obvious now that I look at it. Once you select a user the icon, very sneaky, replaces the refresh icon that was there before and because of this, there is no clear visual cue that anything has changed. I also am beginning to wonder if our reliance on just icons for actions is compounding these kind of issues.

This is another information hierarchy issue!

If you relocate the action out of the blue top area in the header into any location within the white/gray are where the data is, it would be very clear what actions are available.

Having re-read my slack comment, I wanted to clarify that the "top right of the header" that I was talking about what actually the top right of the table header. Either way this issue still stands.

We've identified quite a few hierarchy issues that we're going to rectify moving into the new year. A lot of the fixes are going to revolve around moving actions from the top right of the page header into the relevant table headers. An example of this would be to move the "+" (add organization) on the CF summary page to the organization tab.

The general assertion we will be using when deciding which actions to move will be "this action directly affects the named entity", if this is not the case then we will find a better place for it.