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Joining sessions from the Overlay

Turning on presence sessions allows players to join sessions from the Epic Games Overlay.

Configuration​

To enable Join and Invite functionality in the Epic Games Overlay for parties, make sure you set the PresenceAdvertises setting to Session, like so:

[OnlineSubsystem] 
PresenceAdvertises=Session

Handling events​

To handle session invites being accepted in the overlay (when you click Accept on a session invite) and to handle session joins in the overlay (when you click Join on a friend's session), your game needs to listen for the OnSessionUserInviteAccepted event on the session interface.

The delegate handler for this event must call JoinSession (and once that succeeds, perform the open call to actually connect the client to the server).

Specifying the presence session​

Only one session can be set as the "presence session" (that is, the one associated with the overlay). This is determined by setting bUsesPresence when the session is created, and this setting is inherited on all clients that join the session.