Which Property or Event works with Sound in a server script?

I've tried:

.IsPlaying .Ended .Stopped

They aren't being detected by a Server script, suggestions?

You should detect the events locally and invoke RemoteEvents.

Server:

local Event = Instance.new("RemoteEvent", game.ReplicatedStorage)
Event.Name = "SoundEnded"
Event.OnServerEvent:connect(function(Player)
	-- "Player" now contains the player the sound ended for
end)

Client:

workspace.SomeSound.Ended:connect(function()
	game.ReplicatedStorage:WaitForChild("SoundEnded"):InvokeServer()
end)