I reinstalled Windows 10 pro and Office 2016 on a new SSD and now iCloud no longer syncs calendar items and contacts. It is a known problem. Apple decided to postpone an iCloud update to December. That's now. I hate to check every day.
Please guys, notify us when the update is released!
iPad 2 Wi-Fi + 3G, iOS 9.1, PC: Windows 10 pro and Outlook 2016