I am not able to create Servergroups. I can’t create them in Teamspeak 5 beta, because i can’t find where i can do it. But in Teamspeak 3 i also can’t because i haven’t got permissions for that, even if I am Server Owner and Server Admin.
Server Owner is the default server group of the TeamSpeak free server. However it is not possible to create server groups on these free servers. This is intended behavior.