I just installed LibreOffice_25.8.3.2_Win_x86-64 on a brand new Windows 10 Pro setup. I unchecked the automatic updates as usual. When I started LO, the first thing it did was try to connect to the update server.
I can’t find an option in LibreOffice to disable this. There are some online search references referring to the options window under ‘Libre Office’ for ‘Automatic Updates’ but I guess that was for older versions because it isn’t there now.
How do I make LO stop? No means no.