If it’s getting a bit crowded, you can cancel the old invite link so no one else can use it – just refresh the link from your Realms member settings. Only the newest version of your invite link will allow new players to join so it’s up to you if you want to share the new link with a new group of friends, or keep it private.

When you refresh an invite link, anyone who has previously joined will still be in the Realm whitelist and able to join the world, but no new players will be able to use that link to gain access. Of course, no matter what link they have, other players that you’ve blocked through Xbox Live will never be able to access your worlds.