I've just set an event on my Windows Phone calendar app and it doesn't appear in my Windows 10 PC. Then I've set another event on my Windows 10 calendar app and it doesn't appear on my phone either. How can I sync the two apps to have always the same events between them? PD: I use an outlook account for everything, so is not a "google calendar" problem or something like that, I don't use google calendar or gmail, only outlook. EDIT: Ok, I've just talked with tech support and they solved my problem. Now calendar app syncs between devices properly. Delete this thread.