Sending an Invite to an Existing User

Create the user in Manage > Users> Add New User

The administrator will receive a notification that the user already exists and the opportunity to invite the family to join your organization:

Click “invite” to send the invitation to join your organization. The user will receive an email asking them to agree to be a part of your organization. Any users in their entourage/family will also be available to the account holder so that you can begin to register them.

Under Invited Users you'll see their email address and you can proceed to Accept them if you don't want to wait for them to do it on their end

This is the best process to add a user that already exists outside of your organization.