Can a server send file unconsciously to a viewer?

Hello TeamViewer Community,

Well, I guess that we all know a viewer who establishes a remote connection to a server can open the file transfer to send the files or we can simply drag and drop to the server. We are going to purchase a license for our company but we are worried of a server can send the files back to the viewer unconsciously, is there any chances of it? If it can be, then is there any notification or confimation box showing up? Or the viewer is the only thing can send to the server outside of file transferring and file box features, isn't it?

Since we are an IT remote helpdesk company so we really concern about security. Hope that I can find the right question.

Thank you for your supports.