You can hide menus, but this is not very friendly, and the user only needs to use F9 to show it. What you need - desperately by the sound of it - is server security. Your remote users should have read-only access, and that only to what they need. But it isn't really clear what the user gains with Acrobat Reader that they don't have anyway with File Explorer. Are you assuming that because Acrobat Reader can see your private server for you, that everyone else will see it too?