Portal invitations expire seven days after they have been sent. Personal invitations need to be sent out to the e-mail addresses of all the people who want to register for the portal. The expected method of use for Portal is for you to send an invitation to the e-mail address stored on the Contacts record and then for the person who opens that e-mail and registers with Portal to invite other people to the portal. Once the link is clicked, it expires and cannot be used again. If the e-mail is forwarded to another person without the link being clicked, that other person can click the link and register for the portal. The invitation you send to a specific e-mail address contains a link to register for the portal. You can invite multiple people to use each of those portals. You can have multiple portals, one for each of your contacts. When you invite someone via your Contacts module, a new portal is created for that contact. In order to make a portal active, you must invite someone to use it. Contacts - View, Add and Edit Contacts.
