There are three methods a player can use to join an Adventure Portal on Demiplane. Unless auto-join is enabled, an interested player will not gain full access to a Portal until the player formally requests access to the Portal and the Game Master accepts the player into the Portal.
Join from Demiplane’s ‘Adventures’ or ‘Search’ pages: Game Masters can enable Demiplane’s matchmaking service to create public postings for their Adventures. If you are interested in joining one of these Adventures, you are able to chat with the Portal’s Game Master prior to formally requesting to join. Once you’ve requested to join the Portal, the Game Master must accept you before you’ll gain full access.
Join from Demiplane Invite Link: Following a Demiplane invite link takes you directly to the linked Portal with limited access. You can discover important details about the Portal and chat with the Game Master before requesting to join. After you’ve requested to join and the Game Master accepts you, you’ll gain full access to the Portal.
Join from Email Invite: If your friend invites you to join their Portal using your email address, you can follow the link to gain limited access to their Portal in Demiplane. Since the Game Master or Leader is directly inviting you, you can access the full Portal immediately after agreeing to join.