Spawning object in MP game


I learning multiplayer and have doubt about the better approach for spawning objects in the level/map.

ATM server spawn the objects (random) on multicast event, that work fine, my doubt its when someone login after that spawn event occur he can’t see the objects spawned, how i managed this? i think i can work/get the idea with only some theory, but if anyone knows some sample project… better.

I must keep track of object+transform spawned and spawn on client side when new login?


I search without luck info about that topic, but i found that on Unity


That not exist in UE4 right? i must do that no?