"Automatically sync" in itunes for Windows is greyed out
Hello,
I have a new iphone XS and I'm trying to get it to automatically sync when connected to charger as my previous iphone 7. However the option to sync automatically is greyed out! I have read other posts that say that in preferences/devices I need to have "prevent iphones and ipads from syncing" unchecked. It is unchecked for me so that doesn't solve the problem. Reinstalling itunes didn't help either.
Any ideas as to what I can do?
Thanks in advance!
iPhone 7 Plus, iOS 10.3