Who is authority

• Dedicated server: the server is authority for every player.
• Listen server: the host is authority for every player. Remote clients are not.
• Standalone: you are authority. If you ship only Standalone, open the Solo pages.

UQuestComponent::HasAuthority follows the PlayerState owner. Mutations apply in the component. You do not call the Server_ UFUNCTIONs yourself.

Gameplay that already runs on the server can call CompleteObjective directly.

Gameplay that runs on the owning client can call the same functions. The component sends a Server RPC.