The member is reserved for a specific XBOX user ID. The specified member must join the session to fill the reservation. If a reserved member doesn’t join before the end of JoinTimeout (in the XblMultiplayerMemberInitialization structure), the member is removed from the session.
Inactive
The member is inactive in the current title. The member may be active in another title, as specified by ActiveTitleId in the XblMultiplayerSessionMember structure. If an inactive member doesn’t mark themselves as active before the end of MemberInactiveTimeout (in the XblMultiplayerSessionConstants structure), the member is removed from the session.
Ready
When the shell launches the title to start a multiplayer game, the member is marked as ready. If a ready member doesn’t mark themselves as active before the end of MemberReadyTimeout (in the XblMultiplayerSessionConstants structure), the member is marked as inactive.