At any time, you can invite others to collaborate with you on an InVision board.
To add a collaborator:
Sign in to your InVision Cloud account.
Navigate to the Projects page and open the board.
Directly below the board title, click the plus button.
Check the name of each person you want to invite.
If the person is not already collaborating on other projects, you can invite them by entering their email address in the bottom field. If you're on an Enterprise plan, instead click the bottom link Invite new people to Company.