So I have a Dynamics 365 solution with a portal. I have created a custom entity to hold records relating to events. What I need to do is provide a way for users to log into the portal and register their interest for these events i.e associate their contact record with the relevant event record.
I have seen that in CRM there is the option to associate the current user to an event when they create one through an insert entity form in the portal, but I can't figure out how to do it from a read-only entity form.
