Heyo, first things first, if you have ever played Islands then you will understand what I am trying to accomplish much more but I will try my best to explain myself. So what I am trying to accomplish is being able to invite a friend to your server that is reserved to yourself, like how Islands has it. I talked to one of the developers on it and he said they did it through external servers but I have a few questions as to how I would even start that. Now if this can be done through the use of Messaging Service please let me know as I am already using that for the chat. If anyone has any other questions please reply. Note: I am not asking for code but a more enhanced understanding on how external servers or even how this would be accomplished. I have also looked at various articles and did not find much luck, an answer would be very much appreciated. Thank you!